Try not to use disposable paper cups for boiling water. To prevent water penetration, the inner walls of the paper cups are coated with a thin layer of wax. If the water temperature exceeds 40°C, this layer of wax will melt. Therefore, the paper cup should not be filled with water above 40°C. The paper cups produced by regular manufacturers will use food-grade wax to coat the inner wall of the paper cup, so even if the water temperature is too high, the wax on the inner wall of the paper cup is dissolved, and there is no safety problem. However, there are also illegal processing factories that use low-cost industrial paraffin to coat the inner wall of paper cups. Industrial paraffin contains substances such as benzene and polycyclic aromatic hydrocarbons that are harmful to the human body, which will damage the human nervous system and hematopoietic system. Therefore, when purchasing, be sure to choose paper cups produced by regular manufacturers.
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