... support, and strong workfoce base.3)Quality: We do ceramic for more than 25years,We have already pass ISO9001:2000 ... Our business range:1: color changing plastic mug2: color changing ceramic mug3:music mug4: colorchanging stainless mug5:color changing glass mug6 ... of various types of color-glazed daily used stoneware. pp double wall mug,double insulated plastic cups,double insulated plastic cups