The double pot lid creates a passage for heat transfer on the wall, which heats up the whole cauldron principle. The trapped heat and water vapor wrap the top of the pot to create a pressure effect. The lid of cooking utensils can be applied, which is very economical and saves energy by collecting and using heat emitted from the gas stove to the outside, minimizing the loss of vitamins or minerals during cooking. Energy conservation can reduce fine dust to protect the health of housewives.