1. Wide range of heat preservation: suitable for most milk bottles, cups, coffee mugs and milk cups at home and in the office. The surface temperature of the aluminum plate can reach about 90 degrees at room temperature, and the drink and liquid in the cup can reach a constant temperature of about 55 degrees. Extend the cooling time of hot drinks to keep drinks hot at all times 2. USB power supply: easy to use, one-touch switch. As a reminder: the temperature of the drink depends on the bottom, the material and the thickness of the cup. Use a USB power adapter with an output voltage not lower than (5V 2A) for the best experience 3. Lightweight and Portable: The high quality aluminum plate heats up evenly and quickly. Minimalist design, small size and easy to carry. Suitable for cups with a flat bottom, the heating effect will be better. Not suitable for concave bottom and plastic cups. 4. Waterproof design: Don't worry about splashing, just unplug the power and wipe with a cloth 5. Teapot warmers: It is suitable for all kinds of drinks and liquids that need to be kept warm in most occasions, and there is no need to worry about high temperature damage to drinks. It is also a gift for me, my family and my friends