Yixing Clay Bamboo Large Tea Cup is made of natural purple clay so its features are almost the same as purple clay's. Purple clay material has good breathability and is able to keep tea's flavour and prevent tea from turing bad, making tea soup mellower and tastier. This kind of teacup's clay color is very comfortable and has a good characteristic for making tea. After a long-term using, its color will get rosier. It is easy to learn how to making tea with it and easy to control the temperature.