Perfect for packing in a school lunch box, the compact and lightweight 10 Oz Funtainer food jar is a great choice for keeping foods and snacks at their optimal temperature. Thermos vacuum insulation technology and durable double wall stainless steel construction will keep food hot for 5 hours or cold for 7. The wide mouth design makes it easy to fill, eat from and clean. Exterior stays cool to the touch with hot content and sweat-proof with cold.