Stars Colorful smart LED Temperature Bottle CAPACITY: 500ml color: Black, Blue, Green, Red Product Description WATERPROOF LED DISPLAY: Waterproof LED display that can be completely submerged in water. Just touch the LED screen and the temperature of the liquid will show on the LED screen. You do not have to test the temperature with your mouth or risk to get burn. ULTRA CAPACITY BATTERY: Lithium battery with large capacity, the screen turns off automatically when not in use can reach a battery life . Don’t need to worry about battery rechange issues daily. With HD LCD touch screen for prompt real-time water temperature display. Let you drink the water that is most suitable for temperature anytime, anywhere. STAINLESS STEEL: The 18oz 500 ML bottle is made of 304 stainless steel with food grade PP. Resistant, corrosion resistant, safe and healthy. It reaches the FDA consumption standard with 100% BPA free