The smart water bottle has a waterproof LED display, waterproof, its low energy consumption and without a battery change, that can use several years! Press the top of the thermos softly, Sensitive capacity touch-cover can show the temperature of water inside the thermos immediately that can avoid the embarrassment of burning your. PREMIUM Material-The inner wall is made of 304 grade food grade stainless steel and the outer case is made of high quality 304 stainless steel.