Advanced Thermal Insulation Keep your drinks at the perfect temperature for longer with the Zulay Kitchen Insulated Wine Tumbler. The double-wall, vacuum-sealed insulation keeps beverages cold for up to 9 hours and hot for 3 hours, ensuring that your wine, coffee, or cocktail stays just the way you like it. Premium, Durable Design Crafted from high-quality 18/8 stainless steel, this 12oz wine tumbler is resistant to rust, corrosion, and fading. The powder-coated finish and electroplated copper lining add an extra layer of insulation while preventing condensation or sweating on the exterior. Leak-Proof Silicone Lid Equipped with a removable, BPA-free silicone-sealed lid, this tumbler offers spill-proof convenience. The easy-to-use drinking hole is perfect for sipping or using a straw, making it a great choice for wine lovers on the go.