Most of the disposable packaging boxes currently on the market are made of polystyrene extracted from petroleum, added with a foaming agent, and heated and foamed. Polystyrene is a widely used polymer material. It has the characteristics of low toxicity, high melting point, strong plasticity, and easy production. Therefore, it has become the first choice material for making disposable lunch boxes. Disposable packaging boxes mainly include paper, starch, plastic and rare metals. The foam and calcium carbonate lunch boxes currently on the market have gradually been banned by consumers and national policies and their usage has been reduced. Today's lunch boxes are environmentally friendly lunch boxes, especially corn starch lunch boxes, which are not only environmentally friendly but also can increase farmers' grain income and enable large-scale production of fine processing.

The types of disposable lunch boxes are as follows: Starch-type disposable lunch boxes are edible quick lunch boxes made of starch. As the name suggests, they are made of starchy plants as raw materials, added with dietary fiber and other edible additives and stirred It is kneaded and refined using technologies such as biological compounding, polysaccharide cross-linking, and calcium ion chelation. It consists of four parts: a dense layer, an inner waterproof layer, a rubber mesh layer, and an outer waterproof layer. Cardboard-type disposable lunch boxes are made of 300-350 grams of bleached sulfate wood pulp cardboard as raw materials, and are made through die-cutting, bonding or die-cutting, pressing and shaping through a stamping and forming process similar to sheet metal processing. In order to prevent oil or water seepage, it is necessary to coat the surface with a film or apply chemical additives. It is non-toxic and has no side effects on the human body during production and use. However, the quality requirements for cardboard are higher, and the cost also increases.