... tea in fresh taste 3).artisitic,natural,high quality Glass cupYixing teacup:1.Yixing clay Teacup(Purpleclay teacup ... Purpleclay teapot ) is a rare earth, from scientific research, purple clay does not contain lead, arsenic, cadmium, chromium, ... harm to human healthy, whereas the research proves that purple clay contains SiO2, Al2O3, Fe2O3, MgO, CaO, ... we can discuss the details later Chinese glass cup