1. Judge by the material.

检查餐盒内是否有杂质，有的纸碗看起来很厚实，表面是采用食用级的材质，而中间却采用一些回料纸，而如果不检查出来而误用则很可能导致食物中毒，对于不透明的餐盒，在购买时要多观察餐盒的材质，如果可以撕开则撕开查看。

Check whether there are impurities in the lunch box. Some paper bowls look very thick. The surface is made of food grade material, but some recycled paper is used in the middle. If they are not checked and misused, it is likely to lead to food poisoning. For opaque lunch boxes, observe the material of the lunch box when buying. If they can be torn, tear them up and check.

这些餐盒一般都是由多层构成的，大家在观察时可以多看看产品有无杂质，外表干净也可以撕开看内层是否为合格的食用级PP材质，这样可以更加放心。

These lunch boxes are generally composed of multiple layers. When observing, you can see whether the product has impurities, the appearance is clean, or you can tear it open to see whether the inner layer is qualified edible PP material, so you can be more assured.

2、通过闻味道来判断

2. Judge by smell

如果餐盒在倒入热水后产生了异味，则要警惕可能有毒有害，要避免使用。有很多劣质餐盒都有刺鼻的刺激性气味，而这很可能其中含有有害物质，在高温情况下会挥发出来并向水中迁移进入到食物当中，从而危害到人体健康。所以大家要选择没有异味的一次性餐盒。

If the lunch box has peculiar smell after pouring hot water, be alert to possible toxicity and avoid use. Many inferior lunch boxes have pungent and pungent smell, which is likely to contain harmful substances, which will volatilize and migrate into the water under high temperature, thus endangering human health. So we should choose a disposable lunch box without peculiar smell.

3、通过看餐盒上的标志来判断。

3. Judge by looking at the sign on the lunch box.

一般的正规一次性餐盒在盒子上都应该标注有QS标志和编号，包括使用注意事项、用途、使用环境、使用温度等内容都会有说明

General regular disposable lunch boxes should be marked with QS mark and number on the box, including instructions for use precautions, purpose, use environment, use temperature, etc