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.
A guinomi (ぐい呑み) is another ceramic cup usually part of a sake set. It resembles the small cups called choko or o-choko (お猪口) but is slightly bigger in diameter, but still smaller than a chawan.
I am very fond of these different shaped vessels and started experimenting with form and deforming the perfect round bowl with chawans, yunomis and guinomis as an inspiration. These vessels are all different and unique.