No Sweat: With the insulator sleeve,glass tumbler will not sweat when you put ice into it. It can also reduce heat on surface when drinking hot tea/coffee and hot beverages, and protects tabletop.Everything Tastes Better in Glass: No plastic or metallic taste. Perfect for juices, smoothies, tea, water and more!.Wide mouth: Mouth is wide enough for easily to clean up and adding ice. The glass tumbler body is dishwasher safe. The bamboo lid and the koozie sleeve are easy to remove and put back in, can clean and dry out easily..Good to Go:Tumbler with a splash-proof bamboo lid(NOT 100% LEAK PROOF). The protective koozie protects against chips and cracks. Koozie also provides a non-slip grip, this Iced Coffee Tumbler fits in most standard car cup holders..TIPS: Bamboo lids should be hand wash only. After using, please use water to clean it and dry it out.