JUNSUNMAY 420ml Vacuum Insulated Water Bottle with LED Temperature Display 1. Smart Temperature Display: each of these smart water bottles has a waterproof LED display with low energy consumption, no need to replace the battery, and will last for years, please gently press the top of the bottles, and the sensitive capacity touch cover can instantly display the water temperature in the bottles, avoiding embarrassing burns 2. Stainless Steel Material: the inner wall and the outer shell of the water bottle is made of 304 food grade stainless steel, also have silicone bottoms, designed to keep from slipping and spilling, no worry about the oxidation and corrosion, and won't leave a metallic taste or rust easily, avoiding changing the taste of drinks (such as tea, coffee, and juice), which are safe and healthy to use 3. Easy to Clean: the structure of the insulated water bottle is simple, if you want to clean it, you can just open it and wash it with a bottle brush. 4. Leak Proof Design: the 420ml double walled water bottles are designed to reduce spilling and shaking so the bottle is safe in the bag when you go outside 5. Versatile and Portable: you can take this portable wter travel mug easily while hiking, biking, shopping or leaving it at home or office, fitting many places in many temperature conditions, your cold drink will stay chilled for up to 8 hours, or your coffee or tea will stay hot for up to 6 hours, just enjoy your drinking time with our bottle with temperature display