S'well Elements 17oz Water Bottle in Blue. S'well Elements 17oz Water Bottle in Blue. 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 17oz emulates a standard size water bottle. Keeps beverages cold for 36 hours and hot for 18 hours. Bottle mouths fit most ice cubes, while the bottle fits most cup holders. Hand-wash only. SWER-WA29. BLEL 17 B17. 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.