We're excited to introduce drinkware from Bison Coolers!! Leak-proof and adventure ready, this tumbler uses the thickest stainless steel on the market making it strong, drop-resistant and long lasting.  The vacuum insulated construction keeps liquids cold for 12 hours and hot for up to 6 hours. The leak-proof lid is a screw lid with a flip top.   The powder coated exterior provides a steady grip that won't chip or fade!