'cup-shaped' originates from the combination of 'cup' and 'shape', where 'cup' refers to a small, open container and 'shape' refers to the form or outline of an object.

'cup' and 'shape' have been used in English since the Middle Ages, and their combination into 'cup-shaped' reflects the natural evolution of descriptive language.

Initially, 'cup-shaped' meant 'having the form of a cup', and this meaning has largely remained the same in modern usage.