Features Therma-Swell Technology with triple-layered, vacuum-insulated construction designed to keep beverages colder or hotter, longer than all the rest. The 17oz Original Bottle keeps drinks cold for 36 hours and hot for 18. Offers a condensation-free exterior that won’t sweat in your hands or bag. Made from 18/8, food-grade stainless steel BPA/BPS-free and reusable. Hand-wash only.