Originally, during the Song Dynasty (year 960—1279) this kind of pot was used to prepare the green tea – that at that time was in powder version – thanks to the special shape of the sprout that allows to immediately stop the spilling.
Later on, during the Ming Dynasty (1368―1644), when the tea production became slightly more labor-saving with the introduction of the loose-leaf format, this shape od pottery almost disappeared.
The pot’s body is divided in 6 parts with 4 lines, shaped like a melon. Originally it was made of porcelain, gold, or silver, while nowadays is well regarded in transparent glass.
In the photo below, an original Song Dynasty vase.