I think this is a great question, but I do not have the answer. Mountain House Pro packs are widely available and the addition of a small camp stove like the JetBoil would add quite a bit of variety over Mainstay cookies. But how long are they going to last in a hot car trunk in the southeastern United States? The lack of water in the package would seem to indicate quite a while. Does anyone have any real life experience on this?

Craig.

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From Mountain House's website:

Based on storage studies over several years, in 2006 the shelf life was increased by an impressive 40%, from 5 years to 7 years! That’s right -- our shelf life is at least 7 years from the date of manufacture as long as the pouch is stored unopened in a cool area. After 7 years a change in flavor and appearance may be noticed. For best results, avoid prolonged storage at temperatures above 75° F (24° C).