Can pct copolyester cups be filled with boiling water?

You can't.

The heat-resistant temperature of pct*** polyester cup is about 75 degrees, while the temperature of boiling water is 100 degrees. It will lead to the dissolution and release of harmful substances, such as plasticizers, which will be harmful to health for a long time. Although pct material is transparent, impact resistant and chemically stable, it is not suitable for high temperature environment. Besides boiled water, high-temperature beverages such as hot water, tea and coffee should also avoid using pct cups.

Pct*** polyester material is a kind of thermoplastic polyester, which combines the characteristics of polycarbonate (PC) and polyester (PET). It has both high impact resistance of PC and processability of PET. Pct material has high transparency, excellent heat resistance, cold resistance and chemical corrosion resistance, as well as good mechanical strength and dimensional stability. However, pct has limited heat resistance and is usually not suitable for high temperature environment. In application, pct materials are widely used in packaging, containers, medical devices and other fields.