We're working on a post for our blog about this kind of thing, We've made a pot cozy out of an old sleeping pad that FINALLY allows us to eat hot dinners in the backcountry...

AMazing what you can do with close-cell foam, a knife, and some duct tape!
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Check our our website: http://www.backpackthesierra.com/

Or just read a good mystery novel set in the Sierra; https://www.amazon.com/Danger-Falling-Rocks-Paul-Wagner/dp/0984884963