WATERPROOF LED SCREEN: Waterproof LED display that can be completely submerged in water. Stylish mirror, easy to understand the internal liquid temperature by touching the LED screen. It is not necessary to pass the mouth to check the temperature and avoid burns. The 360 degree rotation does not have to worry about water leakage, and the sealing is good. KEEP COOL HEAT LONG LASTING: Vacuum cups and mugs can block heat transfer. Our products can maintain liquid heat above 42C for up to 6 hours and liquid cooling below 10C for up to 5 hours, which is longer than other vacuum bottles. SAFE, HEALTHY AND PORTABLE: The 500ML premium vacuum flask liner is made of food grade 304 stainless steel and the . Sturdy, corrosion resistant, safe and healthy. meet all your alcohol needs. Sure,(Size:6.5cm*6.5cm*23cm) HIGH CAPACITY BATTERY: Large capacity lithium battery, automatic display when not in use, can reach 2 years of battery life (if the product is damaged within one year, we will exchange or refund), no need s worry about cumbersome battery replacement. The new black technology smart water cup, get rid of the trouble of charging, bring a different experience. APPLICATIONS: This mug is ultra modern and stylish. Whether you're on the go, at home, in the office or outdoors, it's the perfect companion. Simple and practical, it is the best holiday gift for friends, family, children, sons and daughters.