It can be used to heat steamed bread in a microwave, steam cake, etc. without losing water. PP materials are environmentally friendly and safe. Steam or raw food, add appropriate amount of hot water to the steam in the chassis, cover and heat for 8 minutes. It can also be placed in a refrigerator for refrigeration, which is convenient, practical and necessary for the family. After the microwave oven has stopped working, remove it and eat it.