Parts used in the environmental protection boxes on the market at present there are serious quality problem (excessive evaporation residue), the main reason is that the manufacturers to reduce the product cost in the process of production use a lot of minerals such as calcium carbonate, talcum powder and waste plastics, lead to add in the lunch box of minerals and additives and food contains water, vinegar, oil dissolve each other, as people eat food into the body, causing indigestion, local pain, and a variety of diseases such as liver disorder, severe cases can lead to gallstones and heavy metal poisoning, have serious impact on children's mental development.