Can a plastic lunch box be placed in a microwave oven?

Plastic lunch boxes can be placed in the microwave oven, depending on the situation.

Microwave lunch boxes are usually made of PP and PS plastic. PP refers to polypropylene, which has excellent mechanical and thermal properties and is used in various performance laminates and packaging materials. PS is commonly called hard rubber, ordinary hard rubber, hard and brittle. When it is beaten, it emits a metal-like "Ding Dang" sound, which is crisp and sound, commonly known as "sounding gum", non-toxic and tasteless. This kind of material can be applied to packaging, and it is non-toxic and tasteless, and it is safe to use. The PP material lunch box is softer, and the PS lunch box is slightly harder, and there is no difference in other aspects.

These two materials are safe to heat in the microwave oven and will not release toxic substances. It should be noted that the general plastic lunch boxes are marked for microwave oven use. Some lunch boxes are not made of PP, so they cannot be heated in a microwave oven. When hot meals, it is best not to bring a lid.

If it is a plastic lunch box with neither material nor microwave oven and similar content, it cannot be heated in a microwave oven. Such a lunch box may be a poor quality lunch box, and it is best not to use it in a microwave oven.