Mountain House #10 cans. Our unique canning process uses both vacuum oxygen removal and nitrogen flushing. This is a time consuming and slightly more costly process...but well worth it. It is the same process mandated by the U.S. Military for whom we also can. Our foods will have the longest shelf life available...up to 30 years! Each of our cans is coated with a protective enamel inside and out for double protection, including the lid. The cans contents are protected until you are ready to open and use them. After opening, we recommend using the contents within 1 to 2 weeks for best results and taste; using the convenient resealable plastic lid between uses. Treat any leftover food as you would fresh food.