Here's what other sites are saying:
The Mountain House #10 cans are gallon sized, sealed cans of freeze-dried food. These can are awesome for groups backpacking trips, where you want to save money. Mountain House freeze-dried foods are packed in airtight NITROGEN PACKED. Up to 98% of the residual oxygen has been removed. Thier 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. Mountain House foods will have the longest shelf life available...up to 30 years! We've been around for 40 years so we know first hand. Each of thier 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, they 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.
- Mountain Hideaway
Packed in airtight #10 cans, Mountain House freeze-dried foods have the longest shelf life available. We can confidently claim a 25-year shelf life, because our testing has shown the shelf life exceeds 25 years! These independent university studies were performed on actual 20-, 25- and 30-year-old product stored under real-world conditions, which werent always ideal -- not on newer product exposed to an accelerated-time environment in a laboratory.
- Ramsey Outdoor