Gaiwan is a tea brewing vessel traditionally found in China, which is made up of three parts: a lid, bowl, and saucer. In Chinese, the Gaiwan means "lid and bowl" and is most often made from porcelain. It flourished during the Ming dynasty when loose leaf tea became popular. People use Gaiwan tea set to filter tea leaves, no strainer is needed. And it is convenient to appreciate the aroma of tea.
Gaiwan vs teapot, Gaiwans are for individual brewing and emphasize the ritual of the tea ceremony.