1, only the plastic take-out box of No.5 PP can be heated in the microwave oven, and nothing else can.

2. The general international plastic classification number is 1-7. Among them, No.5 polypropylene, marked with the letter PP, has a melting point as high as 167℃, which is a material with strong heat resistance and the only plastic box that can be put into a microwave oven, and can be reused after careful cleaning.