Changzhou Huisheng Maoxin Plastic Products Co., Ltd.

Generally, there is a triangle mark on the plastic lunch box, with different numbers 1-7 inside, representing different materials and also indicating the heat resistance temperature of the lunch box. Whether the plastic lunch box can be heated depends on the sign.

Among the seven categories, only the plastic lunch box marked with the number 5 can be heated in the microwave oven. Its component is polypropylene, which can withstand 130 ℃. When selecting plastic lunch boxes, if there is a "5" sign in the triangle at the bottom, this kind of plastic lunch box can be heated in the microwave oven, but you still need to select a brand of plastic lunch box to ensure the quality.

Special note: If the cover of the plastic lunch box does not have this sign, the cover must be removed when heating. When cleaning such plastic lunch boxes, do not use sharp objects to prevent scratching the plastic surface, which will produce bad chemicals when heated.