A gaiwan is a traditional Chinese tea brewing vessel, typically made of porcelain, glass, or clay. It consists of three parts: a bowl for steeping the tea, a lid to cover the bowl, and a saucer to hold the bowl. The gaiwan allows for easy observation of the tea leaves as they unfurl during brewing, making it popular among tea enthusiasts. This brewing method is often used for high-quality loose-leaf teas, such as green tea or oolong tea. The gaiwan's design enables precise control over steeping time and temperature, enhancing the flavor and aroma of the tea.