1, PPSU's good. It is an amorphous thermoplastic with high transparency and hydrolytic stability, and the product can undergo repeated steam disinfection. Light weight, high temperature resistance (180℃~200℃), wear resistance, long service life, non-toxic, good drug resistance, acid and alkali resistance and good transparency (amber bottle). From the existing research, it is a very good material for water cups.
2, stainless steel cup. Belonging to alloy products, filling water is usually not a problem, but if it is used to fill acidic drinks, such as fruit juice, coffee, carbonated drinks and so on. , it will be easy to precipitate heavy metals in the cup.