Stainless Steel Water Bottle - Onyx. Feature Therma-S'well Technology. Triple-layered, vacuum-insulated construction designed to keep beverages colder or hotter, longer than all the rest. 18/8, food-grade stainless steel that allows for refilling and reusing to reduce the need for single-use plastic water bottles. Copper wall layer creates a condensation-free exterior that won't sweat on hands or in your bag. BPA/BPS-Free and reusable. Hand-wash only. Dimensions 2.8" L x 2.8" W x 20.3" H. Weight 0.5 lb.