cup
觚 centers on a specific type of drinking vessel: a cup, often associated with ritual or formal use.
觚 combines 角 (horn) with 瓜 (melon), likely indicating a cup made from a horn or shaped like a gourd. The exact historical development is uncertain.
A cup made from a horn (角) or a gourd (瓜): picture a drinking vessel carved from one of these natural materials.
For コ, imagine a small cup (こ, ko) of sake: the sound こ cues コ, and the cup is the kanji's meaning.