The Calcutta Powder Coated Stainless Steel Insulated Tumblers won’t sweat in the summer heat and will keep your summertime beverages ice cold (and your coffee steaming hot). These tumblers are ideal for stalking the flats, chasing fish offshore, tagging along to work or just relaxing on the beach. They are double walled, vacuum sealed constructed with 18/8 Stainless Steel and are BPA free. Hand wash only. Calcutta Powder Coated Stainless Steel Insulated Tumblers Features: Heavy Duty Powder Coated finish Vacuum Sealed Double Wall Construction Laser Engraved Logo Includes Lid.