Oxygen Absorbers

The correct size depends on the volume of your container and the type of food you are storing. Generally, 300cc is sufficient for a quart-sized jar, while 500cc is better suited for larger Mylar bags or #10 cans. Always check the specific volume of your container to ensure the absorber is powerful enough to remove the residual oxygen effectively.

No, oxygen absorbers are strictly single-use items. Once they are exposed to the air, they begin the chemical process of absorbing oxygen and will be fully spent within a few hours. You should always use a fresh packet every time you seal a container.

The packets come in sealed 10-packs for a reason. Keep the unused sets in their original, airtight packaging until you are ready to use them. If you have leftover packets from an opened set, seal them immediately in a small, airtight glass jar or a vacuum-sealed bag to prevent them from activating prematurely.

These are food-grade and BPA-free, making them safe for most dry goods like grains, legumes, pasta, and dehydrated foods. However, they should not be used with foods that have high moisture content, as the oxygen-free environment can create conditions where botulism spores could potentially thrive.

You do not need a vacuum sealer, but using one can be helpful. Oxygen absorbers work by removing the oxygen inside the sealed container, which naturally creates a vacuum effect as the air pressure drops. While a vacuum sealer removes the bulk of the air, the absorber is what eliminates the remaining residual oxygen to ensure long-term preservation.