What is a Yunomi vs an Chawan?

A yunomi (Japanese: 湯のみ) is a form of teacup, typically made from a ceramic material, being taller than wide, with a trimmed or turned foot. Unlike the more formal chawan tea bowl which is used during the Japanese tea ceremony, the yunomi is made for daily (or informal) tea drinking.

A chawan (茶碗; literally "tea bowl") is a bowl used for preparing and drinking tea. There are many types of chawan used in East Asian tea ceremonies.