Relax & Enjoy your favorite beverage every single sip with Ezprogear’s Tumbler. With Extra layer walled and vacuum insulated, this tumbler keeps your beverage temperature Hot and Cold for Many Hours. | The exterior of the vacuum sealed area is dipped in copper for more insulation therefore the outer wall will not get any condensation or sweat touch. It will always stay cool to touch and comfortable to handle. | BPA-Free tumbler is safe to use and healthier than any plastic material. This tumbler is made of high quality 304 18/8 food grade stainless steel, Lightweight but strong and indestructible make this tumbler unbreakable for lifetime use. A wise investment for your kitchen. | The stainless-steel tumbler is rust resistant and does not impart an unpleasant scent and flavor. The wide mouth is designed for the liquid to easy fill in and easy to clean by hand. | We highly recommend our customer to hand wash their tumbler for greater longevity. You may use a soapy warm water to clean the tumbler after each use or first-time use.