Thermos Vacuum Insulated Stainless Steel Beverage Can Insulator for 12 Ounce Can, Charcoal - 2 Pack Thermos vacuum insulation technology allows for maximum temperature retention, hot or cold Durable stainless steel interior and exterior Keeps cold 10 times longer than bare can Sweat-proof designed wont leave water rings on furniture Keeps one 12 oz can cold for up to 3 hours