Airtight and reliable #10 cans are a fan favorite for long-term preparedness storage. Cans contain a protective enamel coating to protect and preserve the freeze-dried contents, and with 98% of the oxygen removed, these cans meet U.S. Military standards. After 50 years of testing and research, this freeze-dried food storage is guaranteed to last 25 years. To prepare food, simply add water and eat after just 10 minutes. Once a can is opened, food must be consumed within 1-2 weeks.