Plastic products also have a shelf life. After the expiration date, the plastic will age, become discolored and become brittle. If the plastic box used is found to be yellow or no longer transparent, it should be replaced as soon as possible.
Consumers must pay attention to the shelf life of plastic products. At the same time, aging plastic may release substances that may be harmful to the human body. As for the “life” of a plastic lunch box, it depends on personal use and cleaning methods. The shelf life of most plastic products is generally about three to five years. If it is used frequently, it is better to replace it in one to two years.