[Waterproof LED display]: Waterproof LED display that can be completely immersed in water. Stylish mirror, easy to understand the internal liquid temperature by touching the LED screen. 360-degree rotation does not have to worry about water leakage, and the sealing is good. [Long-lasting heat preservation and cold protection]: Our products can keep the heat of the liquid above 42C for up to 6 hours and at 10C for up to 5 hours. [Safe, healthy and portable]: The inner liner of the 500ML high-quality airless bottle is made of food-grade 304 stainless steel, and the outer shell is made of high-grade 201 stainless steel. Tough, corrosion-resistant, safe and healthy. It has been approved by the FDA to meet all your drinking needs. 100% BPA free. [ULTRA CAPACITY BATTERY]: Large-capacity lithium battery, battery life up to 2 years (the product is damaged within one year, we will replace or refund), do not worry about the cumbersome replacement of the battery. [Application]: Using the most advanced double-wall vacuum technology, this mug is stylish and practical. This is the perfect companion whether you are on the go, at home, in the office or outdoors. Simple and practical, it is the best holiday gift for friends, family, children, and children. Product Color: blue Sustainable warmth and cold protection 1. Our product maintains liquid heat for up to 6 hours above 42C. 2. The liquid cooling temperature is lower than 10C for up to 5 hours. 3. After 24 hours at 100C, the temperature will remain around 40C. LED temperature display touch screen: 1. Waterproof LED display that can be completely immersed in water. 2. Stylish mirror surface, touch the LED screen to easily understand the internal liquid temperature. 3. No need to use mouth to measure temperature to avoid burns. Leak-proof design 1. The travel mug adopts a sealed and splash-proof design to ensure a perfect and safe seal and reliable, non-leakage performance. 2. Therefore, after locking, you can place it anywhere. Don't accidentally open the package. Package includes:1 * Insulated bottle