Food-Grade Material: Our oxygen absorbers are made of food-grade material and have passed strict food safety testing, allowing them to be safely stored with food without producing unpleasant odors commonly found in inferior products. They help 100% preserve the original taste of food. Professional slow-absorbing design: Our oxygen absorbers feature a slow oxygen-absorption rate, giving you ample time to seal your food storage containers and use the remaining absorbers effectively. Unlike many other oxygen absorbers on the market, which lose effectiveness during the sealing process, ours maintain functionality for up to 5 hours. While the absorption speed is gradual, the performance remains reliable. Reduced waste: Each pack contains 10 individually packaged oxygen absorbers, making it easy to use only what you need. This design eliminates the need to reseal large packaging after opening and helps prevent waste caused by exposure to air when unused absorbers are left unsealed. The independent packaging ensures convenience and long-lasting effectiveness. Wide range of uses: This set includes 100 pieces (10 packs of 10) of 200cc oxygen absorbers, suitable for use with most mylar bags, canning lids, and other airtight containers. Ideal for preserving dry foods such as cookies, snacks, spices, cereals, flour, and pasta. Note: Oxygen makes up only about 21% of air, and proper usage requires matching the absorber capacity to the container size for effective results.