杯子是用来喝水、喝牛奶或喝果汁的容器，通常用玻璃、塑料或陶瓷做成。
bēizi shì yòng lái hē shuǐ, hē niúnǎi huò hē guǒzhī de róngqì, tōngcháng yòng bōlí, sùliào huò táocí zuò chéng.
A cup is a container for drinking water, milk, or juice, and is often made of glass, plastic, or ceramic.
杯子是每天喝水或饮料时用的东西，属于日常生活用品。
bēizi shì měitiān hē shuǐ huò yǐnliào shí yòng de dōngxi, shǔyú rìcháng shēnghuó yòngpǐn.
This word is used for a container you drink from every day, like for water or juice, and it belongs to the topic of daily-life items.
A cup specifically for water
A bowl is wider and used for food