The plastic lunch box is the most common food container in daily life, and the plastic lunch box containers are widely used. Because the lunch box is made of PP material, the lunch box can withstand temperatures from -20 ° C to +110 ° C. The lunch box can be used for microwave food cooking and refrigerator food preservation and refrigeration. Not only that, but lunch boxes can also be carried. The lunch box is not only resistant to impact, but also leak-proof, so it is very convenient to carry food. There are many different specifications for the lunch box. Consumers can choose the appropriate lunch box according to the size of their backpack and the amount of food.