Consumers also need to pay attention to the material of the lunch box when purchasing it. At present, there are four types of lunch boxes available for ordinary lunch boxes on the market: plastic lunch boxes, glass lunch boxes, wooden lunch boxes, and stainless steel lunch boxes. So what are the characteristics to pay attention to under different types of lunch boxes? Here, I summarize them into five key points: material (the four materials mentioned above), sealing, partition structure, portability, and cleaning ability. Glass lunch boxes have good sealing performance and are easy to clean, but few people purchase them in the market and the quality is difficult to guarantee. Plastic lunch boxes come in a variety of styles and are very portable. There are many big brands selling plastic lunch boxes in the market, and there are many choices. Stainless steel lunch boxes are easy to clean and carry around, but they cannot be heated in the microwave. Wooden lunch boxes are very environmentally friendly and in line with the current trend of green living, but they cannot be heated in a microwave.