GUARDIAN 12oz KOOLI was designed for those who want their can or bottled beverage cold to the last drop. Our stainless steel two layer construction has an air vacuumed barrier that minimizes the transfer of heat, keeping drinks at their ideal temperature and the vessel sweat-free.  Cold for hours. The powder-coated 18/8 Kitchen grade stainless steel construction is free of BPA & Phthalate, cup holder friendly and dishwasher safe.