Our 304 stainless steel smart thermos flask is suitable for everyone. You do not need to charge, the battery in lid can last 2 years for normal use! Smart Technology: The smart water bottle is equipped with vacuum insulation that maintains the temperature of your beverage for a long time. You just need to slide lightly in the LCD screen, the screen will show the temperature and it will turn off after 2 seconds.Enjoy your beverage at your desired temperature and check the temperature of the drink with the one-touch display. Portable Design: The 500ml insulated water bottle has the appropriate capacity to contain a good amount of your favorite beverage. The non-slip design and smart body of the water flask fit into every cup holder, water bottle pockets stands, etc.carry your favorite beverage with you on the go. Water Bottle Thermos And Tea filter is also made of Food Grade 304 Stainless Steel material, if you are a tea lover, it can separate tea bag and provide a better experience of drinking.Specification:Material: 304 stainless, food gradePP plasticSize: 22.5cm * 6.5cm（8.86inch*2.56inch) Capacity: about 500ml/about17.6ozPackage includes: 1X thermos bottleImportant Note: Just touch the top of the thermos water bottle cap to see the temperature at every moment. Don't touch the top of the smart vacuum flask with force, just touch the top of the thermos bottle cap gently.Tips:There are electronics in the lid. Do not use a microwave oven to heat, and do not soak the lid in water.The temperature of the lid is displayed in degrees Celsius, not in degrees Fahrenheit. 0°C-36°C Suitable for drinking 37°C-60°C Recommend to drink61°C-100°C Drink cautiously