1, plastic lunch box: among plastic materials, only PP material is heat-resistant, so it can only be put into the microwave oven, and other materials are heat-resistant, so it cannot be put into the microwave oven! Classification of plastics Different numbers indicate different materials. The triangle surrounded by three arrows indicates the use of food-grade plastics. The "5" in the triangle and the "PP" below the triangle indicate that the product is made of polypropylene (PP). The material is safe and non-toxic, and the most important thing is that it has excellent high temperature resistance and stable performance. It is a plastic material that can be put into a microwave oven.

2, glass lunch box: inside the glass material, most of the glass material is high temperature resistant, at least the temperature of the microwave oven is no problem, just pay attention to the kind that the heating time can not be particularly long!

3, ceramic lunch box: ceramic materials, most ceramic materials can also withstand high temperatures, and ceramic materials are more resistant to high temperatures than other materials, so the most important thing is to pay attention to his use.