Check the appearance: the paper cup should be wide without deformation. In addition, paper cups with good stiffness should be selected. The paper cup with poor stiffness of the cup body is very soft to hold by hand. After pouring water or drink, it will be seriously deformed when it is brought up, or even it will not be brought up, which will affect the use. When selecting a paper cup, you can gently squeeze both sides of the cup with your hands, and you can roughly know the stiffness of the cup body.
Pay attention to the hygiene of the paper cup: the cup is in direct contact with the mouth, and hygiene is particularly important. Gb11680-1989 hygienic standard for base paper for food packaging stipulates the content of heavy metals, fluorescent brighteners and some pathogenic bacteria. The sanitary condition of paper cups can only be accurately tested in the laboratory. Consumers cannot judge from the appearance, but they can generally be guaranteed by purchasing products from formal manufacturers through formal channels.