Getting stuck outdoors without warm food is not fun. The Magic Cook Triple Layer Thermos Cup Cooker is a handy tool that lets you make your own food anywhere. It can be used for soups, coffee, canned food, and everything in between. It can be used with water activated heat packs that generate heat up to 203F degrees.
This thermos cooker comes with a double wall bottle with a stainless steel cooking component. You can find out more about it here.