1. Judging by the material
Check whether there are impurities in the lunch box. Some paper bowls look very thick. The surface is made of food-grade materials, but some recycled paper is used in the middle. If you don’t check it out and misuse it, it may cause food poisoning. For For opaque lunch boxes, you should pay more attention to the material of the lunch box when purchasing, and tear it open to check if it can be torn.
These lunch boxes are generally made of multiple layers. When you observe, you can check to see if there are any impurities in the product. If the appearance is clean, you can tear it open to see if the inner layer is made of qualified food-grade PP material, so you can feel more at ease.
2. Judging by smell
If the lunch box produces a peculiar smell after pouring hot water, you should be alert that it may be poisonous and harmful, and avoid using it. There are many inferior lunch boxes that have a pungent pungent smell, and this is likely to contain harmful substances, which will volatilize at high temperatures and migrate into the water into the food, thereby endangering human health. So everyone should choose a disposable lunch box that has no peculiar smell.
3. Judging by looking at the logo on the lunch box
General formal disposable lunch boxes should be marked with the QS mark and number on the box, including precautions for use, purpose, use environment, and use temperature.