Calcutta Powder Coated Stainless Steel Double Wall Traveler Drinkware 20oz Spruce w/Lid. The Calcutta Traveler Insulated cups are built for stalking the flats chasing fish offshore tagging along to work or just relaxing on the beach. Even in the heat of summer your Calcutta Tumbler won't sweat. And no matter where your next adventure takes you your Calcutta Traveler will keep your summertime beverages ice cold (and your coffee steaming hot). Calcutta Traveler mugs are double wall vacuum sealed constructed with 18/8 Stainless Steel and are BPA free. Specifications for Calcutta Powder Coated Stainless Steel Double Wall Traveler Drinkware: Manufacturer: Calcutta Volume: 20 oz Fabric/Material: Stainless Steel Age Group: Adults Package Contents: Calcutta Powder Coated Stainless Steel Double Wall Traveler Drinkware Calcutta CSST-20SP: Powder Coated Stainless Steel Double Wall Traveler Drinkware 20oz Spruce w/Lid