It is a special glass-cooker made of transparent heat-resistant food plastic. The volume is 0.5 liters. It is divided into two sections. Bottom – The chamber where the tea is made. And the upper – where is the clean boil. These two compartments are connecting vessels. In the boiling chamber, the tea is laid through the loose bottom cover. It can be any variety – Dahunpao, Teguanin, Longjing, Puer, etc.