15 oz bottle made of 316 stainless steel and food grade PP. Corrosion resistant, safe and healthy. It also features a vacuum insulation layer to keep liquids hot or cold. It preserves the natural fruit flavor of your drink to prevent oxidation and avoids any weird smells. The lid of the thermos cup has an LED display with a built-in measuring chip and a highly sensitive temperature sensor, accurate to ±1 Celsius degree. The screen automatically shuts down after displaying the temperature for about 3 seconds. The screw top is completely leakproof. The tea bottle remains watertight even with 360-degree shaking, so you can carry it or place it in your handbag or backpack with confidence. Enjoy it at home, while traveling, at work, or during play.