Always fun to see comments by folks who don’t have a clue about the topic. Thermal cookers that use retained heat of many sorts have been used for thousands of years around the world. Current versions are a great convenience as well as a way to reduce cooking fuel consumption. Well respected brands like Thermos Shuttle Chef and TigerPot are vacuum insulated and work very well- just search those names for examples and recipes. Other brands like the one in the original article generally use foam rather than a vacuum for insulation and may work but not hold the heat as well.
1 Like
