The Tumbler features a wide mouth and thin rim for easy drinking. Ice cubes fit effortlessly inside. The pop-on, Slide-Open Lid creates a splash-proof experience, ideal for at-home or on-the-go drinking. Therma-S’well® Technology with triple-layered, vacuum-insulated construction designed to keep drinks colder or hotter for longer. Splash-proof, Slide-Open Lid with flexi stainless steel straw. Fits in most cup holders. 18/8, food-grade stainless steel. Condensation-free exterior won't sweat in your hands or bag. BPA/BPS-free and reusable. Dishwasher safe or hand wash with warm soapy water. Lid is top-rack only. Hot liquids may scald. Allow liquids to cool to a drinkable temperature (140°F / 60°C) before using.