The double-wall vacuum-insulated walls give you a worry-free mind knowing your favorite foods are kept icy cold or piping hot for hours. Made of lightweight 18/8 food-grade stainless steel that is non-leaching and will not retain taste or odor. The double-wall technology prevents condensation on the outside for those hot sunny days while keeping the heat within the inner wall so you don't have to worry about burning your hand on your favorite hot soup. The 25oz food container includes a twist-off lid with a steam release button to help vent out the steam for easier opening. The outer twist-off lid is great as a personal bowl for pouring what you can eat now and saving the rest for later. The silicone ring ensures a snug fit to the top of the container to retain your foods’ optimal temperature and is easily removable for proper cleaning. Once every drop of your favorite food is gone conveniently screw it all back together and get going. - Diameter - 4.9". - Hand wash only.