Fifty/Fifty F23001SS0 Vacuum Insulated Food Storage, (24 oz) Made of lightweight 18/8 stainless steel that is recyclable and non-leaching The double-wall technology prevents condensation on the outside of the container so your lunch bag will stay nice and dry! Durable wide-mouth design makes it easy to fill, eat directly from, and then clean Pressure-release valve vents steam from hot foods