25lb buckets stored in a dry location. Each 25lb bucket is $60 or 2 for $100. They were stored and sealed immediately in 5 gallon mylar bags with oxygen absorbers which are in 5 gallon Lowes buckets with a heavy duty screw-on lids. 25+yr shelf life. The buckets, lids, mylar bags and oxygen absorbers alone are worth $13 per set.