At present, most plastic lunch boxes sold on the market are made of polyethylene and polypropylene. Both materials can withstand temperatures above 100°C and are relatively safe to use. When choosing, consumers should pay attention to whether the product is marked with PE (polyethylene) and PP (polypropylene). The most common "5" represents "polypropylene", that is, "PP" material. The temperature resistance range of this PP material is -20 degrees to 120 degrees.

So how do you identify whether the PP material is pure? In addition to looking at the brand and related test reports, you can also use the following methods to identify: Smell the smell. If there is a pungent plastic smell or there is still a smell after holding water, it is basically certain that there is a problem. Look at the appearance. Compare similar lunch boxes together. The more transparent, the purer it is. Pinch the hardness. You can pinch the hardness of the product. Those that are too brittle or too thin can be eliminated; check the product's logo and whether the logo is clear, and whether the plastic box body and lid have corresponding material markings.

There are many types of disposable lunch boxes on the market, and many hotels and restaurants are starting to use disposable biodegradable lunch boxes. In recent years, light salads have become a new favorite among young people. Light salads that focus on nutrition and health are very popular. Using disposable environmentally friendly lunch boxes can better highlight the concept of health and environmental protection, and is currently the most widely used lunch box in China.