At present, bottles, cans, boxes, etc. made of metal or glass account for a small proportion of food or drug sales packaging containers, and there is a gradual downward trend. They are mostly used for gift packaging or special packaging. Boxes, trays, etc. made of thin cardboard are generally used for outer packaging due to poor barrier properties. Only bags, boxes, cups, etc. made of composite materials based on plastic films can play a unique role in protecting food and beautifying the appearance. They are diverse in shape, easy to process, save resources, low in cost, light to use, and highly adaptable.