S'well Stone 25oz Water Bottle in Black. S'well Stone 25oz Water Bottle in Black. 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 25oz holds a workout amount of water, or an entire bottle of wine. Keeps beverages cold for 48 hours and hot for 24. Bottle mouths fit most ice cubes, while the bottle fits most cup holders. Hand wash only. SWER-WA5. 10025-B17-00401. At S'well, they're a design company for good, best known for creating the first, reusable fashion hydration accessory. Founded by Sarah Kauss in 2010 to help rid the world of single-use plastic bottles, they believe something as simple as buying a beautiful reusable bottle or bowl can make a big difference. Whether it's their original, iconic 17-ounce bottle or their latest innovations in food, barware and accessories, everything they make is designed to perform and offer more ways to help you use less.