Rosen's lunch box is heated. Should I open it?

Rosen's lunch needs to be opened when it is heated. Because the lid of most lunch boxes is made of plastic, if the lid is heated directly without any treatment, the plastic may be deformed and even produce chemicals, which will affect health. So it is recommended to remove the lid when heating the toilet. At the same time, if the lunch box is not disassembled, the sealed environment is easy to explode, causing food damage and personal injury. Therefore, when heating Rosen's toilet, it is best to unpack it and heat it with a special plate for microwave oven.