• Features Therma-S’well® 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.