From a professional point of view, the lunch boxes of different materials have different properties. Transparent lunch boxes have high temperature resistance, can be put into the microwave oven, and can see the contents of the meal from the outside. Characterise of foam lunch boxes is good, the quality is relatively light, can stack a dozen lunch boxes will not collapse, although it is non-degradable, but a better performance of its health.
??The most troublesome is that some enterprises are using plastic waste, even imports of foreign garbage to produce lunch boxes. Produced toxic lunch boxes are in domestic sales, and manufactured with good raw meal is for export. The test results showed that the quality inspection departments now have no way to completely determine the foam lunch boxes safe.
??So to ensure the safety of lunch boxes, departments should check the company's purchasing records when they conduct polystyrene recycling . But many companies do not record and have no invoice. So if many companies do illegal production, it is difficult to detect.