The Sherpa 11-oz. Vacuum Tumbler & Insulator. is the next great innovation in drinkware. The Sherpa 11-oz. Vacuum Tumbler & Insulator is designed to work as a tumbler or as a can cooler. The Tumbler has a clear press-on lid with slide closure. The Custom Tumbler features a double wall construction and is vacuum insulated. The Sherpa Vacuum Tumbler and Insulator can keep drink shot for 5 hours and cold for 15 hours This is going to be the product of the summer, to keep your beverages cool while in the heat. Be the first to get this to your clients and employees as a promotional gift.