Thermik 10 oz Lowball Vacuum Insulated Stainless Steel Tumbler Copper plated interior reflects heat to keep drinks even colder than the competition Evacuated chamber insulation keeps your drinks hot or cold all day long Thick double walls prevents condensation so you never need a coaster Includes a BPA free and eco friendly Tritan copolyester lid that brands like Yeti forgot Guaranteed for life against defects in manufacture