Black 16 oz S'well Food Thermos with Nesting Food Continer S’well® Technology with a triple-layered, vacuum-insulated exterior bowl and a durable Tritan™ inner prep bowl designed to keep food colder or hotter, longer than all the rest. The exterior bowl is made of 18/8, food-grade stainless steel and is condensation-free, leak-free and dishwasher-safe.* The BPA/BPS-free inner prep bowl is fridge- and freezer-friendly. It is safe for the microwave and dishwasher. Very good pre-owned condition. Barely used, my high schooler vetoed it.