Good-bye room temperature liquids... introducing the MalloMe 30oz vacuum insulated tumbler! Vacuum Insulation Technology This tumbler has a double walled exterior with a vacuum between the walls. This means that there are no air molecules between your drink and the exterior. The transfer of heat or cold from your beverage to the outside world is virtually eliminated. Your drink will truly stay as hot or cold as science allows. Even filled with ice or boiling water, the bottle will never sweat or get hot to the touch! Premium 18/8 Stainless Steel The MalloMe insulated tumblers are made of high quality food grade 18/8 stainless steel. Whether you are drinking water or coffee, this tumbler will not retain the taste or smell of any liquid. We offer a lifetime guarantee because we believe you will love the quality of this bottle. Sliding & Splash Proof Drinking Lids are Included A sleek and durable lid is included for easy drinking and to keep your drink insulated! Free Handle & Straw With the extra straw for sipping and handle for gripping, the MalloMe tumbler makes for the perfect travel companion.Perfect for any event or adventure This tumbler is perfect at keeping you hydrated at the office, while camping, on road trips, hiking, cycling, golfing, shopping and so much more! Use as a travel mug, coffee cup, tea cup and water bottle.