Mocha pot is a tool for extracting espresso. Mocha pot is made of aluminum or stainless steel and is divided into three parts: upper, middle and lower. The lower seat is a water tank, the middle powder can is filled with coffee powder, and the upper seat is filled with the extracted coffee liquid. The pot body has a pressure relief valve, which can automatically relieve pressure when the pressure is too high. The traditional mocha pot is made of aluminum, which can be heated by open flame or electric furnace. Modern mocha pots are mostly made of stainless steel and can be heated by induction cooker. There is also an electrically heated mocha pot like an electric kettle.