The Kaufmann Outdoor Grey Double-Walled Tumbler (450ml) is the ideal companion for your outdoor adventures, daily commute, or relaxing at home. This tumbler is constructed from high-quality stainless steel with a sleek charcoal finish, ensuring durability and rust resistance. The double-walled insulation maintains your beverage s temperature, keeping drinks hot for 3-5 hours and cold for 5-7 hours, depending on the environment. The visual transparent lid with a push cap ensures no leakage and allows for simple operation. FEATURES AND BENEFITS: Durable Stainless Steel: High-quality, rust-resistant, and BPA-free material. Double-Walled Insulation: Keeps beverages hot for 3-5 hours and cold for 5-7 hours. Charcoal Colour: Stylish and suitable for outdoor activities. Car-Friendly: Fits standard car cup holders. Leak-Proof Lid: Visual transparent lid with push cap for easy drinking. Simple Operation.