Ordering a coffee: The size of coffee you want.

🇨🇳 [你好] is standard and polite, but in coffee shops staff may also skip it and go straight to your order, or use [您好] for extra politeness.

💬 [想要] is a useful soft way to say what you want: [我想要一杯咖啡] or [我想要大杯]. It's less blunt than just saying [要].

💬 [我想要] is a very reusable pattern: [我想要] + thing, like [我想要一杯咖啡] or [我想要中杯].

💬 [一杯] uses [杯] as the counting word for drinks in cups. [一] is read (yì) here because it comes before another fourth-tone syllable: [杯].

💬 For drinks, Chinese often says number + container + drink: [一杯咖啡], [两杯茶]. You can swap the middle word for a different container, like [一瓶水] for a bottle of water.