When purchasing and using disposable plastic cups, consumers should pay attention to the material, labeling, safety, and usage guidelines. Below are specific recommendations for purchasing and use.

Purchasing Tips
When selecting plastic cups, follow the "look, smell, and squeeze" rule: qualified cups should be free of black spots or impurities, and labels should clearly display information such as the product name, material, applicable standards, production date, manufacturer name, and address; they should have no unpleasant odor; and they should not deform easily when squeezed. Consumers are advised to purchase products made by reputable manufacturers through legitimate channels. Pay attention to material information and avoid buying PC (polycarbonate) cups for infants and young children; also, check if the lid gaskets and straws are made of silicone, avoiding products that use PVC. Regarding cups labeled "degradable," be aware that some manufacturers add non-degradable PP (polypropylene) plastic to starch-based or other degradable materials to cut costs, meaning the product cannot fully degrade. Refer to the number code on the bottom of the cup: for example, No. 5 (PP) offers good heat resistance, whereas No. 1 (PET) is heat-resistant only up to 65°C and is suitable only for cold drinks.

Usage Tips
Clean and disinfect new plastic cups before use. Plastic cups are prone to bacterial growth; wash them daily during use, especially after holding beverages like fruit juice, milk, or coffee, ensuring they are cleaned thoroughly and promptly. Avoid using hard brushes for cleaning, as scratches can harbor bacteria. Always read and follow the temperature limits and usage instructions on the label. Avoid reusing disposable plastic cups for extended periods, as they may not meet the quality standards required for long-term use and carry a risk of chemical migration. Check the seal before use to prevent leaks and potential scalding. Replace the cup promptly if it shows significant scratches, stains, peeling patterns, leaks, or if the material surface becomes rough. Consumers should remain aware of safety risks; for instance, some products have previously been found to contain excessive levels of the carcinogen 3-chloro-1,2-propanediol.