Number + 杯 + Liquid / Name + 杯
杯 (bēi) means "cup" and has two main uses: as a measure word for cups of liquid, such as 一杯水 (a cup of water), and as a suffix for cup competitions in sports, such as 世界杯 (World Cup) or 法国杯 (French Cup). The context makes it clear which meaning is intended.
请给我倒一杯咖啡。
Qǐng gěi wǒ dào yī bēi kāfēi.
Please pour me a cup of coffee.
今年的世界杯你看了吗?
Jīnnián de shìjièbēi nǐ kàn le ma?
Did you watch this year's World Cup?
她每天早上喝两杯牛奶。
Tā měitiān zǎoshang hē liǎng bēi niúnǎi.
She drinks two glasses of milk every morning.