Although it is generally forbidden in colleges, I believe that many college students still secretly use electric heating rods. It is troublesome to go out and get hot water. By putting the electric heating rod directly into the kettle, you can heat water easily, which is quite convenient. This heater is a little similar to the principle of the electric heating rod, but it is not used to heat the kettle. Its size is much smaller, and it is used to heat the water in the cup. We often need to use cups to make tea and coffee. Usually, we pour the preheated water into the cup. But now with this cup heater, you can pour cold water directly into the cup, then heat it. If you drink tea or coffee for a long time, the water will become cold. It is also a good thermal preservation tool, allowing you to drink hot beverages at any time. Although it is small, it is very practical and convenient.