Doctor Who 30 oz. Stainless Steel Vacuum Tumbler:This 8-inch tall Doctor Who 30 oz. Stainless Steel Vacuum Tumbler is perfectly flexible no matter where you travel in space or time! It shows theDoctor Whologo on one side and the TARDIS floating through time on the other. The mug features a double-walled design with vacuum insulation technology to provide a superior experience with your favorite beverages. You'll enjoy hot beverages that stay hot for over 4 hours and cold drinks that stay cold for about 40 hours! The BPA-free Tritan lid slides securely closed to reduce spills and can be used with a straw. The double-walled ergonomic design prevents condensation and fits in your hand, as well as your cup holder!