Some plastic boxes can be heated in a microwave.

However, it should be noted that there is a triangular arrow on the outside and a PP plastic box with the number 5 inside, which can be heated in a microwave. In addition, special porcelain, earthenware, heat-resistant glass, polypropylene and polyethylene containers can be used for microwave heating.

Special attention is required:

Avoid using ordinary plastic containers, metal containers, porcelain with metal edges and airtight containers in the microwave oven. Ordinary plastic containers are easily deformed when heated in a microwave oven.

Heating metal utensils in a microwave oven will produce sparks that reflect microwaves, easily causing fire hazards. When a sealed container is heated in a microwave oven, the inside of the container is heated and pressure is generated. If the pressure is too high, it may explode.