Copper-lined, vacuum-insulated deep draw liner maintains optimal drinking temperatures; keeps ice over 48 hours,Dual walled 18-8 Stainless Steel,Lead-free vacuum seal,Includes 2 lids (thumb-slide, screw-on lid and a black can/bottle ring) designed to attach to the Insulator at the same time to prevent loss and provide a seamless on-the-spot transition,Twist top rubberized ring to hold a standard 12 oz. can or bottle,Single self-contained unit transitions between poured drink insulated tumbler, 12 oz can cooler, and 12 oz beer bottle cooler,Fits in corporate and personal coffee machines,1-year limited warranty,Patented