Thermos 8.0L 'Shuttle Chef" Vacuum Thermal Cooker KPS-8000 Cooking without electricity or putting on the stove, how does it work? Thermos Shuttle Chefs uses its renowned vacuum insulation technology to broil soups and stews without the use of electricity or gas. It utilizes a high-quality stainless steel inner pot which is enclosed in an outer pot that is vacuum insulated. All you have to do is boil the inner pot on the stove for 45 minutes, and set the inner pot inside the outer pot, the he