the Clean, Straight Sides of Our New Cupani Thermal Insulated Tumbler Ensures Your Brand has Maximum Exposure. Double Walled, Stainless Steel Metal & Supplied with Clear Transparent, Spill Proof Lid Makes Accidental Slips & Stains Thing of the Past. Keeps Liquids Hot for Up to 4 Hours & Cold for Up to 8 Hours. Minimum Quantity: 40.