This is the 1957th most frequent Chinese word.
杯
Cup.
In this sentence, '杯' again is used as a measure word, associated with liquid contents served in a cup.
她想要一杯热水。
She wants a cup of hot water.
The word '杯' is used as part of the word '杯子' to refer to a physical cup or vessel for holding liquids.
这个杯子很漂亮。
This cup is very beautiful.
Here, '杯' indicates a measure word for the quantity, referring to one cup of a beverage.