The warm yang tank made of glass is the best. Because the glass health-preserving jar contains no plastic components, it is non-toxic and harmless, and the material is firm and easy to clean, which will not affect the taste and nutrition of food. In addition, the glass health pot has high transparency, so it is very convenient to observe the food state. But also resistant to high temperature, and can be used for heating food in a microwave oven, which is very practical. Wenyang pot, whether it is the choice of raw materials or technological operation, embodies the principle of green and health. The tank body is made of iron-rich clay, stone powder and a variety of raw mineral powder by high temperature firing in a specific proportion, which has high temperature resistance and high strength. It integrates cold driving and heat supplementing, which changes the shortcoming that traditional tanks can only drive cold without heat supplementing.