Vacuum Insulated - triple-layered construction, designed to keep beverages cold or hot longer | | TRIPLE-LAYERED INSULATION: Swell Tumbler Yellow Gold 18 oz. stainless steel tumblers feature triple-layered, vacuum-insulated construction, designed to keep beverages cold or hot for longer with our exclusive Therma-Swell Technology. Each Tumbler features unique colors, prints, patterns and textures, all while delivering superior functionality. The Tumbler is hand-wash only | | THE PERFECT FIT: Our Tumbler metal beverage containers are designed with a wide mouth opening and thin rim for easy drinking and adding ice cubes, so you can refill and reuse it over and over. Whether you're headed to a get together or a picnic, youll find Swell Tumbler holds your favorite drinks just right. | | DONT SWEAT IT: S'well beverage containers are insulated with a copper wall layer to make your mug condensation-free so you wont have to sweat about putting it down on your wooden table or cou.