LANAI TUMBLER/CAN INSULATOR CRAFT CANS, SELTZERS, EVEN COFFEE OR TEA The LANAI combines the functionality of a tumbler and a can insulator into one sleek and innovative design. The double-wall stainless steel construction is designed to keep your drinks hot or ice cold by providing a layer of insulation between the can and the environment. Sip on your favorite beverage longer. This 18/8 stainless steel, double-wall, vacuum sealed, 4-in-1 can and bottle drink insulator has been designed to keep your favorite beer, pop, hard seltzer and energy drink ice cold until the last sip.