Swell bottles feature Therma-Swell® 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 wont sweat in your hands or bag. The 17oz emulates a standard size water bottle. Keeps beverages cold for 36 and hot for 18. Bottle mouths fit most ice cubes, while the bottle fits most cup holders. Hand-wash only. Excellent for gym, travel, roadtrips, beach, vacations, hiking, camping, outdoors or as a gift! Would make an excellent gift Check out my other listings for women’s athletic tops ***Bundle and save on shipping*** Smoke-free, pet-free home