2. A hot water kettle made of glass is similar to a ceramic hot water kettle. The container will not produce harmful chemicals after heating at high temperature, and the cleanliness of water can be clearly seen after boiling.
3. In terms of heat transfer effect, copper pot is the best, and boiling water is also fast. However, after heating at high temperature, copper is easy to produce some chemicals that are not good for the health, and it is not suitable for long-term use.
4. The iron pot is cheap, the heat transfer speed is fast, and it also contains trace element iron which is beneficial to human health. However, the water boiled in an iron pot has an iron taste and is easy to rust.
5. stainless steel pot should be the most practical material. Stainless steel pot is not easy to rust. It is cheaper and easier to use than ceramics and glass pots in hardness and price, and it is lighter. In addition, stainless steel has good thermal conductivity and short time. The electric kettle made of 304 stainless steel burns water and does not contain any toxic substances.