200 cc Oxy-Guard Absorbers. They are small iron powder packets used to absorb oxygen in packets, cans or buckets.
Oxygen absorbers are small packets of iron powder that allow oxygen and moisture to enter but does not allow the powder to leak out. Absorbers increase the storage life of food and they are safe to place in containers with the food. One 200 cc absorber is recommended for small cans, and small mylar bags. Use the 500cc size for #10 cans and buckets.