Features Therma-S'well Technology with triple-layered, vacuum-insulated construction designed to keep beverages colder or hotter, longer than all the rest. Made from 18/8, food-grade stainless steel. Offers a condensation-free exterior that won't sweat in your hands or bag. The 502.7 ml emulates a standard size water bottle. Keeps beverages cold for 36 and hot for 18. Bottle mouths fit most ice cubes, while the bottle fits most cup holders. Hand wash only.