Nowadays, disposable tableware represented by paper cups has entered people's lives, and its safety issues have also received much attention. According to national regulations, disposable paper cups cannot be made from recycled waste paper and fluorescent bleach cannot be added. However, many paper cups use recycled paper in violation of regulations. Add a large amount of fluorescent bleach to make it white, and then add some industrial calcium carbonate and talcum powder to increase its weight. In addition, in order to withstand high temperatures, the paper cup is covered with a layer of coated paper. According to regulations, standard non-toxic polyethylene should be selected, but some manufacturers have used industrial polyethylene or waste plastic from medical waste and chemical packaging to replace it.

There are three types of disposable paper cups: one is made of white cardboard, mainly used to hold dry food such as french fries and popcorn, and cannot hold water; The second type is a waxed paper cup, which is thick and waterproof, but cannot hold food with a temperature exceeding 40 ℃; The third type is a paper plastic cup, where the outer wall is coated with a layer of paper and the inner wall is coated with a layer of coated paper to prevent water and oil.

The advantages and disadvantages of disposable paper cups can be identified through the method of "seeing, smelling, and touching". Look at the manufacturer's name, address, production date, etc. on the packaging, and also look at the light. If there is blue light or impurities, it is best not to buy; Second, smell for any pungent odor; Three touch feeling is particularly soft, it may be a low-quality product. When using disposable paper cups, it is best to first scald them with boiling water to allow the harmful substances in the cups to fully evaporate.