Definition (容器)
A quantity of a drink contained in a glass.
一杯（某种饮品）
She ordered a glass of iced tea to go with her lunch.
她点了一杯冰茶来搭配她的午餐。
It’s so hot; I could really use a glass of cold lemonade.
天气这么热，我真想喝一杯冰凉的柠檬水。
He always has a glass of red wine with dinner.
他晚餐时总会喝一杯红酒。