Temperature DisplayDrinks cup flask no need to charge, you can check the temperature inside the thermos by touching the LED screen. After the temperature is displayed for 3-4 seconds, it will automatically turn off and switch to energy saving mode. Tip: Wipe the cap when cleaning it, don't soak it in water. Keep Hot or Cold The Silicone sealing ring tight closure securely keeps the contents in the Mug. Because a vacuum hinders heat transfer. No matter how hot or cold it is outside, your beverages will stay warm in the Insulation . Safe and HealthyThe inner liner of the leak-proof drinking bottle is made of food-grade 304 stainless steel, and the outer shell is made of high-quality 201 stainless steel, Antibacterial and corrosion resistant, easy to clean. BPA free for your hydration needs. Environmental protectionReusable. This water bottle is perfect for anyone who likes to carry their favorite beverages with them while actively avoiding contamination. The cup also includes a filter that blocks tea, fruit, ice, etc. Wide ApplicationThis mug is beautiful in appearance, comes in a variety of colors, whether you are traveling, at home, in the office or outdoors, it is your ideal companion. Simple and practical, it is the best Christmas gift for friends, family. How to Remove the Smell of Stainless Steel Vacuum Flask Method 1: Slice fresh lemons, put them in a stainless steel cup, pour in warm water, soak them for 15 minutes, pour them out and wash them with clean water. Method 2: Add 30g of salt to a stainless steel cup, pour boiling water, let the salt water stand in the cup for 15 minutes, and then rinse with water. Method 3: Pour milk into a stainless steel cup, let it stand for about 1 hour, pour out the milk and rinse with water. A variety of colors are available, comfortable feel, low-key and simple, delicate tentacles, wear-resistant and scratch-resistant.