1, logo. When we choose a lunch box, we should first look at whether it has 3C certification, and whether the product packaging has information such as the material used, manufacturer and address. Generally, qualified products have this information. If you don't have it, you'd better not buy it.

2. Material. The bento box is made of ceramics, stainless steel, glass, pp plastic and other materials. No matter what kind of material is used in the lunch box, it needs to meet the food-grade standard. Lunch boxes made of different materials have their own characteristics. For example, lunch boxes made of ceramic materials have high safety performance and beautiful appearance, but they are bulky and inconvenient to carry. Stainless steel lunch box has good chemical stability and is strong and resistant to falling, but its shape is monotonous and so on. We can choose according to our own needs.

3. Function. We'd better buy multi-level lunch boxes and store the food separately, so that there will be no odor. When buying a lunch box, you should also pay attention to its sealing performance, and choose a lunch box with good sealing performance. For example, today's lunch box has many basic functions, such as heat preservation, preservation, microwave and so on. We can choose according to our own needs.