Description: Premium Material: Crafted from food-grade stainless steel, this travel flask is rustproof and designed for long term durability. The hygienic button lid with an internal filter ensures a clean and convenient pouring experience Exceptional Temperature Retention: Keep your beverage hot or cold for extended periods. It maintains heat at approximately 65C for up to 24 hours and around 50C for up to 50 hours. For cold drinks, it retains a temperature of about 10C within the first 24 hours and approximately 20C within 50 hours Large Capacity: With a large capacity of 4000ml (135oz), this flask is suitable for sharing drinks with family or friends during outings or events Convenient Portability: Comes with a carrying case that allows you to easily transport the flask on your back, making it ideal for gym bags, cars, bicycles, backpacks, long hikes, classes, road trips, or any outdoor activities Insulation Design: Features a strong insulated stainless steel interior lining that enhances its ability to maintain beverage temperatures while ensuring durability against daily wear and tear Specification: Material: Stainless Steel Size Chart: 14cmx43cm/5.51inchx16.93inch Package Includes: 1x Insulated Water Jug Note: Please allow slightly errors 1-2cm/0.39-0.79inch differences due to manual measurement.