cup前面用什么介词

前面用介词in，in the cup，意思是在杯子里，例如：

1、It can be clearly seen that there is a film of oil on the surface of the water in the cup.可以明显地看到杯子里的水上面有一层油。

2、There's money in the cup.奖杯里有钱。

3、The money in the cup， daddy.奖杯里的钱啊，老爸。