This Stainless food jar is an ideal choice for people on the go, the Stainless King Vacuum Insulated Food Jar is built to last and loaded with features to make for a more enjoyable eating experience. THERMOS vacuum insulation technology virtually eliminates temperature change within the food container by creating an airless space between two stainless steel walls. The result is an insulation layer that performs better than any other. A superior insulated container you can depend on to keep your food hotter, colder, fresher, longer. This food jar keeps items hot for 7 hours or cold for 9 hours, making it a great choice for long days where mealtimes might be a little irregular.