1, look at the appearance: first, look at the basic information of the product, including the manufacturer, address, contact information, conformity mark, certification standard, etc. The second is to look at the product appearance permeability, mainly in the light. If the appearance of the product is uneven and there are gray-black particles, it is best not to buy it. Third, look at the color, preferably white, because colored plastics have additives and contain chemical elements, which may cause harm to the body. For example, colored plastic bottles with color masterbatch are put together with oil, vinegar and drinks, which is harmful to people's health.

2. Smell: Qualified plastic products have no pungent smell, and unqualified plastic products have unpleasant smell. You'd better open the lid and smell it before buying. If it smells uncomfortable, don't buy it. In addition, plastic products will also produce substances harmful to the human body after being put away for a long time, and they can also smell the smell of deterioration. For the sake of your health, you must be careful when choosing products, and don't pick them up and leave.

3, feel: qualified plastic products have smooth surface, no discoloration and elasticity. When buying, you can gently twist it by hand, and be careful not to use too much force to avoid damage. If the people in the mall don't allow the product to be distorted, buy it back and test it.

Although qualified plastic tableware is acid-resistant and alkali-resistant, it will also be toxic under strong acid and alkali. It is recommended not to use plastic tableware to hold acidic and alkaline foods for a long time. In addition, oily food is also the natural enemy of plastic tableware, and the contact between them will release harmful chemicals from plastic tableware, which is harmful to human body.