TRIPLE-LAYERED INSULATION: S’well 17oz Bottle with stainless steel. Triple-layered, vacuum-insulated construction. Exclusive Therma-S’well Technology keeps beverages cold for 36 hours and hot for 18. Hand-wash. THE PERFECT FIT: Designed with an opening wide enough for most ice cubes and makes it easy to refill. Whether you're hitting the road, bike trails, or the gym, you’ll find S’well fits just right in most standard-size cup holders. DON'T SWEAT IT: Offers a condensation-free exterior that won't sweat in your hands or bag. WORRY-FREE HYDRATION: Made from 18/8, food-grade stainless steel. BPA/BPS-free and reusable. Compliant with California Prop 65 regulations. SUSTAINABILITY WITHOUT COMPROMISE: You won't have to compromise fashion and functionality to live more sustainably with our sleek, beautifully crafted bottles. Every S’well purchased counts towards displacing millions of single-use plastic bottles.