Old-style Double Happiness pressure cooker material

The material of the old Shuangxi pressure cooker is aluminum alloy. Aluminum alloy is more affordable, the surface oxide layer should not be broken, and can be cooled quickly with cold water.

Pressure cooker, also known as pressure cooker, with which the food being steamed can be heated to more than 100 ℃, invented in 1679 by the French physicist Denis Papin. With its unique high-temperature and high-pressure function, it greatly shortens the cooking time and saves energy; however, pressure cookers with high working pressure are also more destructive to nutrition.