Cha Hai is also called a "fair-for-all jug". It ensures that everyone gets the same flavour in their cup when brewing tea for several people in gong-fu style. Empty your gaiwan or teapot into the Cha Hai and then use it to fill up the cups.
If pour tea into the drinking cups straight from your pot or gaiwan the tea keeps brewing while you're serving, and the last cup will have stronger brew than the first. Cha Hai is an important step to make sure you get the best our of your tea. It also looks beautiful and is a pleasure to handle.
Clear glass allows appreciation of the colour of the tea. This Cha Hai is suitable for all teas.