“杯形”的英语？

他将手掌在嘴边弯成杯形喊叫.He cupped his hands around his mouth and called.毛茛是一种野生植物,开杯形黄色花.The buttercup is a wild plant with bright yellow cup - shaped flowers.但杯形蛋糕的出现就是一种意料之外的惊喜了.But the offer of cupcakes was an unexpected bonus....