I was reading an article that listed X things that every prepper forgets. On the list was the Wonderbag. I have never heard of such a thing. The Wonderbag was founded in South Africa and cooks without electricity. Claims state that it cooks like a crockpot. Instructions state: cook your food in a pot, bring it to a boil then place it in the Wonderbag and the food will keep cooking. Wonderbag Non-Electric Portable Slow Cooker with Recipe Cookbook, Red Batik: Amazon.com: Grocery & Gourmet Food I mentioned this amazing invention to my cooking instructor @tacmotusn, he pointed out that I could simply make my own. (*not a huge box just one that will fit the pot) This is great knowledge. If one does not have lots of fuel for cooking, one can use this insulated method to prepare meals. It is not as fast but it gets the job done. As @tacmotusn pointed out, you may have to play with things a bit to get it right but the general concept is there. Anyone have experience with insulated cooking?