Item Type: Vacuum FlaskMaterial: 316 Stainless SteelWeight: Approx. 360g / 12.7ozProduct Size: Approx. 22.5x6.5cm / 8.9x2.6inCapacity: 480mlCover with Built-In Lithium Battery 18650Battery Capacity: 2450mAhHow to Use: Hold the lid, unscrew the lid counterclockwise, pour a small amount of hot or ice water, pour it out after preheating or pre-cooling, and then pour in hot water or ice water to achieve a better heat preservation (cold) effect.Cleaning Method:1. Please do not completely immerse the cup body in water for cleaning2. Do not use diluent, gasoline, metal grinding powder, steel wire ball, decontamination powder and other things to clean the product3. When cleaning, put in an appropriate amount of neutral detergent to dilute with water and use a soft cloth for scrubbing.4. If not used for a long time, please wash and dry, and store in a dry and ventilated place.