... tea in fresh taste purple clay tea cup 1.Purple clay cup/mug can keep ... the tea and coffee in fresh taste 3 days without changing, 2.The cup ... surface with very beautiful shape, it can combine the picture, caliigraphy and engraving together, so it with artistic culture3.The purple ... healthy, whereas the research proves that purple clay contains SiO2, Al2O3, Fe2O3, ...