If you have searched for the best oxygen absorbers for dry goods, you are almost certainly solving one of two problems: you want your rice, beans, flour and freeze-dried food to still be edible in five years, or you have a room full of sealed containers and no idea whether the packets inside are still doing anything. Both problems come down to the same thing, and that is size. An oxygen absorber is a single-use packet of iron powder that scrubs oxygen out of a sealed container, and the number printed on the front tells you how much oxygen it can remove before it is finished.
Our team compared ten of the highest-rated absorbers on the market across cc rating, pack subdivision, indicator design, packet film quality and real review history. The short version: match the cc number to the air volume of your container, not to the weight of the food, and check the indicator the moment the package arrives. Everything below is built around that rule.
One clarification before we start. Oxygen absorbers remove oxygen. They do not remove moisture, and they do not kill insects that are already inside the food. If your real problem is humidity or dampness in a pantry, you want a desiccant instead, and we explain the difference further down. Understanding that split is what stops people from packing jars twice and fixing nothing.
We have been storing bulk dry goods in mason jars and mylar bags for years, and the mistakes we see repeat are always the same three: a packet that is too small for the container, a package that sat open for an hour before use, and a seal that was never checked. The picks below are ordered to put the most broadly useful absorber first, not the highest star rating.
Last updated for October 2026. Every cc rating, pack count and rating in this guide is taken from the current product listing, and every claim about how a packet behaved comes from buyer feedback on that listing.
Our Top 3 Best Oxygen Absorbers for Dry Goods (October 2026)
Before the full list, these three are the ones we reach for most. Each one wins a different kind of container, which matters more than a star rating in this category.
O2frepak 200CC 100-Pack
- 200cc capacity
- 100 packets
- Anti-oil film for oily and oil-free food
- Food-grade packet material
ZRLEI 400cc 100 Count
- 400cc sized for 1 gallon mylar
- Sets of five
- double layer film
- Food-grade tested packaging
O2frepak 200CC 100-Pack is the broadest pick here. Its 200cc size covers pint and quart jars through most 1 gallon bags, the anti-oil film means it works on jerky and nuts as well as flour, and it carries by far the deepest review base in this group at more than 5600 ratings. If you want one absorber that covers most of what a household packs, this is the one.
ZRLEI 400cc 100 Count is the value choice for gallon mylar work. Four hundred cc is the size most people need for a full 1 gallon bag, the packs come in sets of five so you only open what you need, and its 4.7 average sits alongside a review count high enough to trust.
FreshUS 300cc 100 Packets is the canners pick. Ten individually sealed bags of ten, a pink to purple indicator disc, and a track record with lids that seal themselves on canning jars. Made in the USA by a food packaging company operating since 1993.
Comparing All 10 Oxygen Absorbers Side by Side
This table covers every product in the guide with the three numbers that actually decide whether a packet suits your container: absorption capacity, how the packets are subdivided, and what the film is built for.
| Product | Specs | Action |
|---|---|---|
| O2frepak 200CC 100-Pack |
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Check Latest Price |
| FreshUS 300cc 100 Packets |
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| ZRLEI 400cc 100 Count |
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 LIFJOY 500cc 120-Pack |
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 OxySorb 100cc 100 Packs |
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 OXYGONE 100cc 80 Packets |
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 LinsKind 100cc 110-Pack |
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 Wallaby 500cc 100 Count |
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 Midukit 500cc 50 Wrapped |
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 auhanth 100cc 100 Packs |
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Check Latest Price |
1. O2frepak 200CC 100-Pack – the All-Rounder With the Biggest Review Base
O2frepak 200CC(100Packets) Food Grade Oxygen Absorbers Packets Food Storage
200cc capacity
100 packets
Anti-oil film
Food-grade packet material
Pros
- Deepest review base in this group at 4.6 stars
- Anti-oil film works on high-oil and oil-free foods
- One brand covers 20cc to 2000cc so you can stay in one product line
- Four stage quality control system
- Listed weight of 7.84 ounces for 100 packets
Cons
- Sold as one bulk bag rather than individually sealed packets
- Opened packets start absorbing immediately and must be resealed fast
When someone asks us which single absorber to buy first, O2frepak is the answer. The 200cc packet is the size that maps to quart jars and most 1 gallon mylar bags, which is where the majority of home packing happens. The whole pack weighs 7.84 ounces, so it disappears into a bucket without shifting the food around.
The differentiator here is the anti-oil function. Standard absorber film is a single layer that can allow oil from jerky, nuts or high-fat freeze-dried meals to seep into the packet. This listing describes a tested double-requirement film that handles both oily and oil-free foods, and buyers mention it specifically when packing meat jerky and roasted nuts.
The single drawback is packaging format. You get 100 packets in one bag, not 100 separately sealed packets. The moment you tear that bag open the clock starts, and reviewers repeatedly flag that you should move what you are not using straight into a sealed jar or a zip bag. Plan your session around it, open once, and press the air out.
Buyer feedback runs at 4.6 stars across more than 5600 ratings, the deepest pool in this roundup, and the praise is consistent rather than scattered. The most common positive note is simply that it works for both food with lots of oil and food with none, which is exactly the flexibility most households need.
How the 200CC Size Maps to Real Containers
Two hundred cc handles a pint jar with room to spare and a quart jar comfortably. For a 1 gallon mylar bag filled with a dense food like rice or beans, it is enough when the bag is packed reasonably full, because a tightly filled bag has less air volume than the nominal gallon.
Why the Anti-Oil Film Matters More Than It Sounds
If oil seeps into an absorber packet, the iron powder inside stops working as intended and you can end up with a small stain or a bitter spot in the food. The anti-oil construction on this listing is aimed squarely at that failure, and it is the reason this is our pick for anyone storing home-canned or home-dried meat products rather than only grains.
Who Should Buy This One
Anyone building a mixed pantry of grains, flours, nuts and freeze-dried output. It is also the easiest to scale because the same brand is offered from 20cc through 2000cc, so a household that starts with jars can add gallon bags later without changing suppliers.
Where It Falls Short
Bulk packaging is the honest weakness here. If you pack two jars a month and then leave the rest of the bag on the counter for a month, those remaining packets are effectively spent before you use them. For very casual packers, one of the individually sealed options lower in this list is a better fit.
2. FreshUS 300cc 10-Pack of 10 – the Best Choice for Canning and Mason Jars
FreshUS 300cc Oxygen Absorber(10 individual pack of 10 Packets, Total 100 Packets) – Long Term Food Storage (100, 300 CC)
300cc capacity
10 bags of 10, 100 total
Made in USA since 1993
Pink to purple indicator disc
Pros
- Indicator disc makes packet condition visible on arrival
- Ten vacuum bags of ten limit waste for small batch canners
- Made in the USA by a food packaging specialist operating since 1993
- Reported to pull canning lids down on mason jars
Cons
- Outer package is opaque so you cannot inspect contents before opening
- Newer smaller packet design can confuse buyers used to the older size
FreshUS is the absorber that shows you what it is doing. The listing includes an oxygen indicator disc where pink means the packets are good and purple means exhausted, which turns the single most common complaint in this category, is my packet dead, into something you can check in a second.
You receive ten individual packs of ten packets, one hundred in total. That subdivision matters more than the headline count. A canner filling a few jars at a time opens one ten-packet bag and leaves the other nine sealed, which is the difference between wasting three packets and wasting none.
The manufacturer is a food packaging company that has been operating since 1993, and that focus shows in the details buyers talk about. Canners, dehydrator owners and freeze-dryer owners consistently report that these packets keep dry goods fresh for years and pull standard canning lids down during processing, which is visible proof that oxygen is leaving the jar.
One review theme worth knowing: a minority of buyers report questions about freshness outcomes, and some mention receiving older-looking packaging with a discolored indicator disc from a third-party seller. This is exactly why the indicator exists. If the disc arrives purple, return it rather than trusting the date printed on the box.
Why 300CC Suits Mason Jars and Quart Jars Well
Three hundred cc is a comfortable match for quart and half gallon jars, and it has enough headroom to handle a 1 gallon bag that is not completely full. The upgraded packet design is physically smaller than the older version while delivering the same effectiveness, so it fits regular mouth jars where a bulky packet would not.
Reading the Indicator Disc Correctly
Pink on arrival means the packets are unspent. Purple or blue means they were exposed and are no longer worth trusting. Check the disc before you start a session, not after, because once packets are in a sealed jar the disc tells you nothing about that specific jar, only about the batch.
Same Brand Across Sizes
The listing also points to 50cc, 500cc and 2000cc versions under the same brand, so a household that starts with canning jars can step up to gallon mylar work and then to five gallon buckets without changing systems.
Who Should Buy This One
Home canners and freeze-dryer owners first, then anyone who packs in small batches and hates throwing away unspent packets. If you store a pantry slowly and carefully rather than in one weekend bulk run, the ten-packet subdivision pays for itself quickly.
3. ZRLEI 400cc 100 Count – the Best Value for 1 Gallon Mylar Bags
400cc Oxygen Absorbers for Food Storage – 100 Count (20x Packs of 5) – for Long Term Food Storage & Survival, Mylar Bags, Canning, Harvest Right Freeze Dryer, Dehydrated, and Preserved Foods
400cc capacity
100 packets in 20 sets of 5
Double layer anti-oil film
Food-grade tested packaging
Pros
- 400cc is the size that matches a 1 gallon mylar bag exactly
- 4.7 average alongside one of the highest review counts in the guide
- Sets of five let you open only what you need
- Heat sealed immediately after production and never repackaged
Cons
- Bags do not collapse like vacuum bags which surprises some buyers
- Double layer film makes each packet slightly larger
Four hundred cc is the number most gallon mylar bag packing actually needs, and ZRLEI sells it in a hundred-packet pack of twenty five-packet sets. That is the sweet spot between one packet that does the whole job and a bulk bag where half of it goes stale on your shelf.
At 4.7 stars, this is tied for the highest average in the guide among products with more than 2000 ratings. Buyers consistently praise the five-count packaging, the fact that 400cc is correctly matched to gallon bags, and the sealing consistency across the whole pack.
The sets are heat sealed right after production and the listing states they are never repackaged, which matters because a packet that has sat in an open warehouse bin has already begun reacting with whatever oxygen was around it. The double layer anti-oil film is the same construction used on the higher-oil foods like nuts and jerky.
There is one recurring expectation gap worth repeating here, because it shows up in reviews of every absorber brand: these bags do not collapse. An absorber strips oxygen, which is about one fifth of the volume of air, and it does not create the vacuum that a vacuum sealer creates.
Why 400CC Is the Gallon Bag Sweet Spot
A one gallon mylar bag is rarely packed to a true gallon of air. Rice, beans, oats and flour settle densely, and a well-filled bag may hold closer to half a gallon of actual air volume once you account for the food itself and the headspace. Four hundred cc covers that comfortably with margin.
What Absorbers Do and Do Not Remove
Understanding this removes a lot of confusion at the packing bench. An absorber removes oxygen, which stops the oxidation that causes rancidity, discoloration, stale smell and the conditions that let grain weevils and moths develop. It does not remove nitrogen, it does not remove moisture, and it will not make a sealed bag physically smaller.
Set Sizes and Session Planning
Twenty sets of five means a weekend of packing five jars at a time is realistic without waste. If you are filling fifty gallon bags in one afternoon, open five sets and keep the rest sealed in the outer packaging until the following session.
Who Should Buy This One
Anyone whose main storage format is 1 gallon mylar bags, particularly households that also freeze dry and want the correct rating for a full bag without oversizing. It is our recommendation for the widest range of common dry goods at a fair unit cost.
4. LIFJOY 500cc 120-Pack – the Top Rated Choice for Jerky, Nuts and Spices
120 Packs 500CC Food Grade Oxygen Absorbers (10 Pack in Individual Vacuum Bag ) , Oxygen Absorbers For Long Term Food Storage with Oxygen Indicator , Works in Mylar Bags, Mason Jars, and Vacuum Bags
500cc capacity
120 packets in 12 vacuum bags
Pink oxygen indicator
Double layer anti-oil film
Pros
- Largest count of any 500cc option here at 120 packets
- Indicator disc confirms usability on arrival
- Factory reports ISO 9001 certification and 18 years of absorber experience
- Anti-oil film suited to jerky nuts spices candy and pet food
Cons
- Packs of ten still need resealing promptly after opening
- 500cc is oversized for anything smaller than a gallon container
Where O2frepak covers 200cc, LIFJOY jumps to 500cc and packs 120 of them into twelve vacuum bags of ten. That is the configuration for anyone whose pantry leans oily: home jerky, roasted nuts, spices, candy, and pet food, all of which appear in the intended uses on this listing.
The oxygen indicator is the detail buyers mention first, and it works the same way as on the FreshUS packs. Pink means usable, and you can check the disc on each vacuum bag before you open it. With twelve bags you can inspect the whole shipment in about ten seconds.
Backing claims here are the most specific in the roundup. The factory reports ISO 9001 certification and 18 years of experience making oxygen absorbers, which is a stronger answer to the endless which brand is good question than most listings manage. No widespread functional complaints appear in the roughly 2470 ratings, and the average is 4.7.
The one recurring practical note is that the ten-packet bags, despite being vacuum sealed, still need resealing promptly once opened. Nothing in this category stays active after you tear the seal, no matter how the packet was packaged.
When 500CC Is the Right Call and When It Is Overkill
Five hundred cc is right for a 1 gallon container that is loosely filled, for a 2 gallon bag, and for any bulk container where you would rather use one packet than work out two. It is genuinely oversized for a pint or quart jar, and pairing 500cc with a small jar is the fastest way to get a lid that refuses to seal properly.
High-Oil Foods Are the Real Target
The double layer anti-oil film is what makes this a strong fit for jerky and nuts. Oil migration into a standard packet degrades the iron powder and can leave a mark in the food, so the film construction is doing real work here rather than being a marketing line.
Counting the Real Cost Per Container
With 120 packets in the box, the useful number is not the packet count but the container count. At one packet per gallon container, that is 120 containers. At two per 2 gallon bag, it is 240 bags worth of capacity from a single purchase, which is why bulk counts like this make sense once you are past the trial stage.
Who Should Buy This One
Jerky makers, nut storage, spice libraries, and households with more than a dozen containers to pack at a time. If you already know you will use a hundred packets or more, the higher count stops being about price and starts being about convenience.
5. OxySorb 100cc 100 Packs – the Long-Running Pick for Dehydrated Foods
Oxy-Sorb 100cc Oxygen Absorbers for Food Storage 100 Packs, Preserving Food Freshness with Food Grade Oxygen Absorbers for Long-Term Storage, O2 Absorbers Food Grade for Mylar Bags,Mason Jars,Canning
100cc capacity
100 packets
Containers up to 1 quart
Pink to violet indicator disc
Pros
- Listing dates back to 2001 with a long consistent review history
- Designed specifically for containers up to 1 quart size
- Indicator disc shows remaining capacity
- Effective on flour sugar rice beans and brown sugar
Cons
- Arrives as one bulk bag so opened packets activate within minutes
- Packaging does not prominently warn about immediate resealing
OxySorb is the oldest listing in this roundup, first available in 2001, and it is still being bought and still being recommended by people who pack dry goods today. Longevity in a category where brand quality swings is worth paying attention to.
At 100cc it is a jar-sized absorber, designed for containers up to 1 quart. That makes it the natural companion to a dehydrator, since dehydrated fruit, vegetables and jerky usually come out in quantities that fill a quart jar rather than a gallon bag.
The most enthusiastic buyer reports describe mason jar lids sealing themselves after processing, which is the clearest visual confirmation that oxygen is being pulled from the headspace. Effectiveness reports on flour, sugar, rice, beans and brown sugar are consistent across the more than 2200 ratings, which average 4.6.
The Bulk Packaging Problem in Plain Terms
One hundred packets arrive in a single bag, and the review consensus is that you have roughly fifteen minutes of usable working time after opening. That is not a flaw unique to this brand, but it is the reason the ten-packet and five-packet options higher in this list are more forgiving for casual packers.
Pairing With Gas Flushing and Vacuum Systems
The listing positions this absorber as a companion to gas flushing or vacuum packaging rather than a replacement. For anyone with a vacuum sealer, using both removes the residual oxygen that a vacuum alone cannot reach, and this 100cc size fits the small bags a vacuum sealer actually handles.
Who Should Buy This One
Dehydrator owners packing quart jars, and canners who want an absorber tested across two decades of use rather than two hundred reviews. The dated listing is a genuine confidence signal in a category with a lot of very new entrants.
6. OXYGONE 100cc 80 Packets – the Most Versatile for Bulk Jar Packing
OXYGONE 100 CC [80 Packets] Premium Oxygen Absorbers for Food Storage, Oxygen Absorbers(2 Bag of 40 Packets) – ISO 9001 Certified Facility Manufactured
100cc capacity
80 packets in 2 bags of 40
ISO 9001 certified facility
FDA compliant packet material
Pros
- Two bags of 40 halve the amount exposed at once
- ISO 9001 certified manufacturing with FDA compliant packet material
- Packet dimensions of 1.5 by 2.0 inches suit regular mouth jars
- Value suits filling a hundred or more containers in one session
Cons
- The 40-packet bags still need resealing after opening
- Some listing metadata is inconsistent about the total packet count
OXYGONE is the pick when the deciding factor is how many jars you are filling. At 80 packets of 100cc in a two-bag split, it makes sense for a household packing a hundred quart jars in a single weekend.
The split into two bags of 40 is the feature buyers cite most, and it is a real one. Halving the exposed quantity means half the purchase stays sealed through the session, which on a bulk run is the difference between using everything you paid for and finding a batch of dead packets in the back of the drawer next month.
![100 CC [80 Packets] Premium Oxygen Absorbers for Food Storage, Oxygen Absorbers(2 Bag of 40 Packets) - ISO 9001 Certified Facility Manufactured customer photo 1](https://spreadingsantorum.com/wp-content/uploads/2026/09/B01MXZ6UR7_customer_1.jpg)
Manufacturing is done in an ISO 9001 certified facility with packet material that is FDA food compliant and tested for food use, and the packets are packaged inside a Mylar bag rather than a thin poly bag. The packet itself measures 1.5 by 2.0 inches, which is a size that drops into a regular mouth mason jar without crowding the headspace.
Two things to know. The forty-packet bags need resealing the moment you open them, and the listing metadata is not perfectly consistent about the total count, so verify what is actually in the package before you plan a packing session around it.
![100 CC [80 Packets] Premium Oxygen Absorbers for Food Storage, Oxygen Absorbers(2 Bag of 40 Packets) - ISO 9001 Certified Facility Manufactured customer photo 2](https://spreadingsantorum.com/wp-content/uploads/2026/09/B01MXZ6UR7_customer_2.jpg)
When Bulk Beats Subdivision
If you are filling a hundred or more containers in one go, subdivision stops being useful because you will use every packet anyway. At that point the two-bag split gives you a checkpoint halfway through, and the lower per packet cost is what makes the run worthwhile.
Sizing Notes for Jar Packers
One hundred cc is the right rating for a pint jar and generally sufficient for a quart jar filled with a dense, dry food. It is not enough for a half gallon jar and it is well short of a full gallon bag, so this is a jar product rather than a bag product.
Who Should Buy This One
High volume home canners, school or community food stores, and anyone building a serious dry goods reserve over a weekend. It is also a sensible second purchase once you have already tested a smaller pack and know how many jars a year you actually fill.
7. LinsKind 100cc 110-Pack – the Best Mason Jar Packets With an Indicator
LinsKind 110 Packs 100CC Food Grade Oxygen Absorbers (10 Packs in Individual Vacuum Bag, 11x Packs of 10), Oxygen Absorbers for Food Storage, with Oxygen Indicator, for Mylar Bags, Mason Jars, Canning
100cc capacity
110 packets in 11 vacuum bags
Oxygen indicator included
ISO 9001 factory
Pros
- Eleven separate vacuum bags of ten keep unused packets fresh
- 110 packets is one of the higher counts at the 100cc size
- Indicator included so you can check condition on arrival
- Double layer anti-oil film for both oily and oil-free foods
Cons
- Sized for pint and quart jars rather than gallon containers
- 110 packets is a small buy for a large stockpile
LinsKind solves the exact problem that makes people abandon absorbers: the packet sitting open in a drawer, slowly spent, long before the jar it was bought for. Eleven vacuum bags of ten, each heat sealed, mean that you open one bag per session and the rest stay sealed where they are.
At 100cc these are jar packets, and they are deliberately not a gallon bag product. The intended fit is pint and quart mason jars, which is where most home storage happens for people who prefer glass to foil.
The build quality signals are solid for this tier. The factory reports ISO 9001 certification and 18 years of absorber production experience, the film is double layer and anti-oil so it handles nuts and spices as well as grain, and an oxygen indicator is included so you can confirm the batch is live before you commit to a long session.
Ratings land at 4.7 across roughly 1840 reviews, and the feedback concentrates on two things: the subdivision keeps waste down, and the value at this count is hard to argue with. There is no dedicated gallon bag option inside this particular pack, which is the one limitation to plan around.
Subdivision Is the Whole Argument Here
Oxygen absorbers have no off switch. Once exposed to air they begin reacting, and the useful life of an unused packet depends entirely on how little air it sees. Vacuum bagging ten at a time is the cheapest insurance in this category, and it costs nothing extra beyond opening fewer bags.
Matching 100CC to Mason Jar Sizes
A standard pint jar is comfortably served by 100cc, and a quart jar filled with dry flour, sugar or rice works well with one. If the jar has a full inch of headspace or more, step up to a larger packet rather than assuming the rating transfers between container sizes.
Who Should Buy This One
Glass-only storers, and anyone who packs a few jars at a time rather than in bulk runs. The 110 count and the eleven-way subdivision make it the most forgiving packet format at the 100cc size we compared.
8. Wallaby 500cc 100 Count – the Best Matched Set for Gallon Mylar Work
Wallaby 500cc Oxygen Absorbers for Mylar Food Storage, Max Absorbing
500cc capacity
100 packets in 10 packs of 10
Zipper seal outer bag
FDA food grade packet material
Pros
- 500cc sizing matched to 1 gallon mylar bag format
- Zipper seal outer bag keeps the ten sets organized and fresh
- Tens of packs heat sealed after production and never repackaged
- Other capacities run from 300cc to 2500cc in the same line
Cons
- About one fifth of air volume is removed so bags do not shrink
- 100 packets is a smaller count than the 120-packet 500cc option in this roundup
Wallaby is the one to consider when your storage format is mylar bags rather than glass, and when you want the rating to line up exactly with the bag. The 500cc packet is the size this listing matches to a 1 gallon mylar bag, and the same line runs from 300cc up to 2500cc for two gallon and five gallon work.
The zipper seal outer bag is a nice piece of engineering. It keeps the ten sealed sets of ten upright, organized and away from humidity in a pantry, and it means you can put the whole purchase back on a shelf without transferring packets into another container.
Buyer feedback runs at 4.7 stars from around 1430 ratings, and the two details people mention are the zipper bag and the fact that the sets are heat sealed immediately after production and never repackaged. Repackaging is the hidden enemy of this category, because a packet that has been loose in a carton has already seen a lot of air.
The honest drawback is a smaller count than some rivals at the same 500cc rating, plus the same physics everyone hits: the bags do not collapse. If you are filling a large reserve and want more packets per purchase, the 120-packet 500cc option higher in this list gives you more capacity per carton.
Matching a 500CC Packet to Bag Volume
For a 1 gallon mylar bag, 500cc gives real headroom, which is useful when the bag is filled with a light, bulky food like oats or pasta rather than dense rice. For 2 gallon bags you generally want two packets distributed at either end of the bag rather than one in the middle.
Why Never Repackaged Matters
Every packet in this listing is heat sealed straight from production. That is a supply chain detail, not a product feature, but it is the single best predictor of whether unused packets will still be good two years from now, and it is the reason experienced packers pay more for sealed sets.
Who Should Buy This One
Mylar bag users who want one brand across the full size range, households moving from jars to bags and then to buckets, and anyone who values organization and sealing discipline over the lowest per packet figure.
9. Midukit 500cc 50 Individually Wrapped – for Packers Who Hate Waste
Individually Wrapped – Oxygen Absorbers for Food Storage 500cc, 50 Packs
500cc stated capacity
50 individually sealed packets
Three layer food-grade film
Vacuum packed
Pros
- Every single packet is individually sealed and vacuum packed
- No waste when packing only a few jars at a time
- Three layer film is designed to block oil seepage and dust
- Users report jars and vacuum bags sealing firmly
Cons
- Multiple reviewers say packets look closer to 100cc than the 500cc label
- Some report no measurable effect in 1 gallon bags even with two packets
- Lowest rated pick in this roundup
Midukit is the only listing in this roundup where all 50 packets are individually sealed and vacuum packed, and that is a genuine advantage for anyone who packs a jar or two at a time. Nothing sits exposed, so nothing is wasted between sessions.
It is also the lowest rated product here, at 4.5 stars across 850 ratings, and the reason is consistent enough that you should read it before buying. Multiple reviewers describe the physical packets as closer to 100cc than the 500cc stated on the label, and a smaller number report no measurable effect in gallon mylar bags even when using two packets.
That does not make it a bad product. The three layer food-grade film is specified to resist oil seepage and dust, the total stated absorption across the pack is 25000 cc, and buyers who use it for smaller containers report that jars and vacuum bags seal firmly. It performs exactly as advertised for the uses it suits.
The lesson is to size up if you choose it. If you plan to use these in 1 gallon or larger bags, use two and expect less than the label implies. If you are sealing pint and quart jars, the individual wrapping advantage may outweigh the capacity question entirely.
Individual Wrapping Versus Subdivided Bags
Both approaches solve waste, but they solve different waste. Individually wrapped packets are better when you pack sporadically, one jar at a time. Vacuum bags of five or ten are better when you pack in a scheduled session, because you open one bag rather than peeling fifty individual seals.
How to Check the Capacity Question Yourself
Before committing a gallon bag to this product, do a small test. Seal one quart jar of rice with a single packet, leave it for a week, and then test whether the jar holds a partial vacuum. If the lid does not draw down, the packet is not doing what the label claims at that volume.
Who Should Buy This One
Casual preservers, apartment dwellers, and anyone who stores a few jars at a time rather than filling a whole food reserve. Read the capacity reviews first, and buy a small quantity first.
10. auhanth 100cc 100 Packs – the Best Small Batch Choice for Regular Mouth Jars
auhanth 100 Packs 100CC Oxygen Absorbers (10 Packs of 10), Food Grade Oxygen Absorbers for Long Term Food Storage in Vacuum Bag, Applicable to Mason Jars, Vacuum Storage Bags
100cc capacity
100 packets in 10 vacuum bags
Micro drilling anti-oil film
Self seal closure
Pros
- Compact 100cc packet fits regular mouth jars better than larger sizes
- Ten packs of ten in individual vacuum bags reduce waste
- Double layer anti-oil film resists powder leakage into food
- Self seal closure is easy to press shut after opening
Cons
- A small number of buyers could not detect a difference after months
- Some report slight variability in effectiveness between packs
auhanth is the pick for freeze-dryers and herbalists who store in regular mouth mason jars, because the packet is physically compact and drops into a standard jar without eating headspace. That headspace is the difference between a lid that seals and a lid that does not.
Ten packs of ten in individual vacuum bags, heat sealed after production, give you the same subdivision benefit as the other multi-bag options. The film uses what the listing describes as micro drilling technology, which is aimed at letting oxygen in while keeping iron powder out of your food.
Two details in the listing are worth internalising. The absorber generates heat while it works, which is entirely normal and not a sign of a fault, and the same listing notes other sizes exist in 500cc 100-packs and 2000cc 20-packs for stepping up to larger containers later.
Ratings sit at 4.7 from 636 reviews, the smallest review base among the ten products here, so treat the average with slightly more caution than the others. A handful of buyers could not detect any difference in their stored food after months, and some note slight variability between packs, which is a fair description of any absorber in this category.
Why Headspace Decides Whether a Lid Seals
A mason jar lid needs a partial vacuum to pull down and stay down. An absorber works by removing oxygen from the headspace above the food, and if the packet is physically too large for the gap, it props the lid open and the seal never forms. The compact 100cc format exists specifically to avoid this.
Packing Small Batches Without Waste
Because the packets come in vacuum sealed tens, you can open one bag, pack several jars, and reseal the rest. Freeze-dryer output is typically irregular, so this matters more for that use case than for someone filling fifty jars in a row.
Who Should Buy This One
Freeze-dryer owners, herbalists and anyone working in regular mouth jars. The 4.7 average is encouraging, and buying a smaller quantity first is the sensible way to confirm the effect in your own food before committing to a bulk run.
Oxygen Absorber Size Chart: cc by Container Volume
The single most useful thing on this page is the rule that cc ratings match air volume, not food weight. A ten pound bag of rice and a two pound bag of rice hold very different amounts of air, and it is the air that the packet has to clear.
Use the sizing list below as a starting point, then adjust up if your container is loosely filled. Denser foods such as rice, beans and flour leave less air than light foods such as oats, pasta and cereal, so a loosely filled oat bag needs more cc than a tightly packed bean bag of the same nominal volume.
Pint mason jar, 2 cups: 50cc or 100cc. One 100cc packet is comfortable and still leaves headspace.
Quart mason jar, 4 cups: 100cc. Well filled jars need one packet, loosely filled jars need two.
Half gallon jar, 8 cups: 200cc. This is the point where 200cc becomes the natural choice.
1 gallon mylar bag: 400cc to 500cc. 400cc is fine for dense food, 500cc for light or loosely filled bags.
2 gallon mylar bag: 500cc, two packets. Distribute one at each end rather than both in the centre.
5 gallon mylar bag: 1000cc or two 500cc. Place packets at the bottom, middle and top of the fill.
5 gallon food bucket: 2000cc to 2500cc. Pack rice in layers and place a packet in each layer.
There are five steps to picking a size, and they take about a minute. First, measure the air volume of the container, which is the nominal volume minus the volume of the food. Second, match that figure to the list above. Third, round up if the container is loosely filled or the food is light and bulky. Fourth, add a second packet if the container is longer than a foot, since air at the far end takes longer to reach the packet. Fifth, write the date on the container with a marker so you know when the packet was used.
One more consideration. An absorber has a fixed capacity rating, and once it has used that capacity it is finished regardless of how good the seal is. Oversizing is not dangerous, it simply wastes part of the packet, while undersizing means oxygen is never fully removed and the packet looks like it worked when it did not.
How to Use Absorbers in Mason Jars, Mylar Bags and Buckets
Using an absorber is simple, but the sequence matters more than the product. For mason jars, fill the dry food, tap it down to settle and remove excess air gaps, place one packet on top of the food rather than against the glass, and leave at least three quarters of an inch of headspace. Wipe the rim clean, place the lid and band, and process for the time your jar size and food require.
That headspace rule is the answer to the most common forum complaint in this category, which is lids that refuse to seal. A packet that is too large for the gap physically props the lid up, and a lid that is propped up is a lid with no vacuum. If you remember nothing else from this guide, remember that the packet goes in after the food, not beside it.
For mylar bags, fill the bag while keeping the food surface as flat as possible, place the packet in the top third of the bag, and remove as much trapped air as you can by pressing gently before you seal. Heat seal across the full width, run a finger along the seal to check for gaps, and then squeeze the bag gently to feel for even resistance. A properly sealed bag with a working absorber feels noticeably different from one with a dead packet.
For 5 gallon buckets, layering beats a single packet. Add a few inches of rice or beans, drop in packets, add the next layer, repeat, and finish with a packet at the top of the fill. Air sits at the top of a bucket and settles between layers, so distributing packets vertically is far more effective than dropping one large packet at the bottom.
A note on vacuum sealing. You do not need both for dry goods, and the two do different jobs. A vacuum sealer removes bulk air and creates physical pressure that keeps the bag firm. An absorber removes the oxygen that remains after the air is gone. For a long term dry goods store, the absorber is doing the preservation work, and the vacuum seal is optional.
Are Oxygen Absorbers Safe? Plus the Foods to Keep Away From Them
Yes, oxygen absorbers are safe to use with food and safe to leave in the food. The active ingredient is powdered iron, the same metal as a cast iron pan, along with salt and a small amount of activator. It is not a desiccant chemical, it does not dissolve into food, and the packet itself is a sealed barrier designed to keep the contents contained.
The genuine safety question is not toxicity, it is suffocation. An absorber reduces oxygen in a sealed container, and the packet should never go into a space occupied by people or animals. Do not use them in a refrigerator that a child might open and hide inside, and do not let loose packets become a plaything.
Now the foods that should never get an absorber. Anything already wet or high in moisture, including fresh fruit, fresh vegetables, cut bread and any food with visible condensation, because removing oxygen does nothing to stop the moisture that causes mold. Anything already showing mold, spoilage or insect damage, because an absorber cannot reverse either problem and sealing it in preserves the problem for years. Any oil-preserved or vacuum-canned food being reprocessed. And any food in a container that is not going to be sealed properly, since an absorber in a leaky container simply spends its capacity on the room.
For freeze-dried food, absorbers work well and are standard practice, with the caveat that texture quality declines over time regardless of oxygen level. Combining an absorber with proper moisture control gives the best result, and if humidity in your home is a factor, a desiccant in the same container is a sensible pairing.
One more safety note about residual packet powder. Occasional reviewers note a small amount of iron dust in a packet, which is why the anti-oil and micro drilling film designs exist. Keep packets from being punctured by sharp dry goods such as broken rice or seed, and do not cut into a packet.
How to Tell If an Oxygen Absorber Has Gone Bad
There are three ways to check, in increasing order of reliability. The indicator disc is the fastest: look for the small dot on the packet. Pink means usable, purple or blue means spent, on the products in this roundup that include one.
The second method is physical. An unused packet is flat and soft, and an exhausted packet is hard and often slightly swollen. Bending one between your fingers tells you quickly, and a pack of ten straight from a vacuum bag should feel noticeably flat.
The third method is a container test, and it is the only one that proves a packet works inside a specific jar. Fill a jar of dry rice, add the packet, seal it with a lid, and leave it for a day or two. If the lid pulls down and holds, the packet is pulling oxygen. If the lid stays loose, the packet is spent or undersized for that container.
Understanding the failure modes matters too. Absorbers do not kill weevils or grain moth eggs that are already in the food, so freezing or heating the food before packing is still the standard precaution when the grain came from an open bag. And they cannot fix food that has already oxidised. Discoloured flour, rancid nut oils and faded spices are already changed.
Storage conditions are the other half of this. Heat and humidity both shorten the useful life of unused packets, which is why a pantry jar in a cool cupboard keeps unused packets workable far longer than one kept in a garage.
Oxygen Absorber vs Desiccant: Which One You Actually Need
This is the most confused pair in food storage, and the two products solve completely different problems. An oxygen absorber removes oxygen, which is what causes rancidity, discoloration, stale odor, oxidation browning and the conditions that let grain insects develop. A desiccant removes moisture, typically silica gel, which is what causes mold, mustiness and clumping.
For dry goods like rice, beans, flour and pasta, an oxygen absorber is usually the priority, because those foods are dry enough that moisture is rarely the limiting factor. For foods that absorb humidity easily, such as flour, powdered milk, candy and some freeze-dried goods, a desiccant earns its place alongside the absorber.
Silica gel packets are reusable when you regenerate them, while oxygen absorbers are single use and cannot be reactivated. That difference matters when you plan: an absorber is a consumable you replace every time you seal, and a desiccant is a tool you keep.
If your real problem is a damp pantry, humid closet or dry indoor air rather than long term food storage, that is a different category of product entirely, and our guides to humidifiers for dry climates and air purifiers for dry environments cover that side of the problem, as does our pick for the best humidifiers for dry skin if the dryness you are fighting is the air in your home rather than the air in your jars.
How to Store Unused Oxygen Absorbers
Store unused packets the way the factory did, which means airtight, cool and dark. The moment a packet meets air it starts spending its capacity, and the whole game is minimising the air it sees before you use it.
Four steps cover it. First, transfer unused packets from a torn bulk bag into a sealed glass jar or a zip-top bag, and press out the excess air. Second, if your purchase is still factory sealed, leave it sealed, because the outer Mylar or vacuum bag is doing the work for you. Third, keep the container in a cool, dark cupboard rather than a garage or an attic, since heat shortens usable life. Fourth, write the purchase date on the jar, and plan to test one packet in a sealed jar before committing to a five year food supply.
Never store absorbers in an unsealed plastic bag on a workbench, and never return used packets to the storage container. A used packet is finished. Discard it, and do not be fooled by a packet that looks flat because the powder has settled.
Frequently Asked Questions
What size oxygen absorber do I need for a quart mason jar?
Use one 100cc packet for a quart mason jar filled with a dense dry food such as rice, beans or flour. If the jar is loosely filled or the food is light and bulky like oats or cereal, use two 100cc packets instead. The packet must sit on top of the food with at least three quarters of an inch of headspace so the lid can pull down and seal.
Are oxygen absorbers safe for food storage?
Yes. An oxygen absorber is a sealed packet of powdered iron, salt and a small activator, and it is designed to stay intact inside the container. The real safety concern is not toxicity but suffocation, so never place packets where a child or pet could be sealed inside a container. The packet must not be punctured by sharp food such as broken rice or seed.
What foods should not use oxygen absorbers?
Never use an absorber with wet or high moisture foods such as fresh fruit and vegetables, with any food already showing mold, spoilage or insect damage, or with food in a container you cannot seal properly. An absorber removes oxygen, not moisture, so it cannot prevent mold in damp food and it cannot reverse spoilage that has already started. Seal the packet in only food that is bone dry and in good condition.
How do I know if my oxygen absorber is still good?
Three checks work. Look at the indicator disc, where pink means usable and purple or blue means exhausted. Bend the packet, since an unused packet is flat and an exhausted one is hard and slightly swollen. For a full test, seal a jar of dry rice with the packet and leave it a day or two to see whether the lid pulls down and holds.
Can you store flour in mason jars with oxygen absorbers?
Yes, and flour is one of the strongest use cases because it is dense, dry and prone to oxidation browning and mustiness. Fill the jar, tap it down to remove air gaps, place one 100cc packet on top of the flour, and leave three quarters of an inch of headspace before processing the lid. For very large quantities, a 200cc packet per quart of flour is the safer margin.
What is the best moisture absorber for food storage?
For moisture specifically, the answer is a desiccant such as a silica gel packet, not an oxygen absorber. Oxygen absorbers remove oxygen and prevent rancidity and insect damage, while desiccants remove moisture and prevent mold and clumping. Most dry goods storage benefits more from an oxygen absorber, but flour, powdered milk, candy and freeze-dried food benefit from both together. Desiccants are reusable, absorbers are single use.
Which Oxygen Absorber Should You Buy
If you pack quart mason jars and 1 gallon mylar bags and want one product that handles both, the O2frepak 200CC 100-Pack is the pick. It has the deepest review base in this roundup and an anti-oil film that works on grains, flour, jerky and nuts alike.
If your storage format is 1 gallon mylar bags, choose the ZRLEI 400cc 100 Count. Four hundred cc is the size that actually matches a gallon bag, the five-packet sets waste nothing between sessions, and it carries a 4.7 average on more than 2800 ratings. If you are filling a large number of containers and cost per packet drives the decision, the OXYGONE 100cc 80 Packets is the budget route.
If you can, freeze dry or put up canning jars, go with the FreshUS 300cc pack. The pink to purple indicator disc removes the guesswork about whether a batch is still live, and the ten-packet subdivision suits canners who work in small batches.
Whichever of the best oxygen absorbers for dry goods you settle on, buy a small quantity first, run one sealed-jar test, and only then commit to a bulk run. The packet is cheap insurance, but only if it is still active when you seal it. Updated for October 2026.
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