The common packaging boxes on the market mainly use 3 kinds of materials, which are No. 1, No. 5 and No. 6:

 No. 1 polyethylene terephthalate (PET): plastic bottles of mineral water, fruit juice, carbonated drinks are made of it;

 No. 5 polypropylene (PP): the best heat resistance, it is commonly used in plastic utensils that can be heated in microwave ovens;

 No. 6 polystyrene (PS): It is used for the lids of many milk teas now;

 It is generally safe to pack food in plastic lunch boxes made of these materials.

 Can disposable plastic lunch boxes be put into the microwave?

 Disposable food in a lunch box is safe, but it does not mean that it is also safe to reheat. In the disposable plastic packaging box, only plastic polypropylene (PP) of No. 5 can be put into the microwave oven.

 Polypropylene (PP) is relatively heat-resistant and can withstand high temperatures of around 200 °C, so it can be microwaved, and repeated heating will not be a big problem.

 The heat resistance of other plastics is much worse, it is best not to heat directly, and do not pack too hot food, of course, can not be used repeatedly.

 If you are too lazy to read the label, or you are still worried, then to be on the safe side, it is best to pour the packaged meals into plates or bowls, and then heat them in the microwave.