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