Black mug that reveals Yin and Yang when you pour your coffee, tea or hot water.
 The mug turns white with the black part of the yin yang and the calligraphy "Wing Chun"
 Heat-reactive mug, due to the printing process, no use of chemicals, you can use it safely.
 33 cl mug, hand wash, avoid microwaves and washing machines. Do not leave it in the sun for a long time.