If it is a disposable plastic dining box, it cannot be reused, because repeated use of this material will cause some harm to the human body.

Microplastics will be released from the plastic at a high temperature above 70℃, and microplastics will be produced at a temperature above 60℃. Moreover, many chemicals, such as pigment component and plastic component phenol, will precipitate bright red, not to mention the above substances are more likely to precipitate in oily environment. It is required that the temperature should be above 70 degrees when the food is loaded in the dining center, which shows that the plastic lunch box is unsafe and has uncertain potential harm and influence on the health of teachers and students. And you can't carry out thorough high-temperature disinfection! These harmful substances will enter children with food, and long-term use will have a great impact on health.