Shenzhen Yong Rui Bianse Arts & Crafts Co., Ltd. is a sole-invested company specializing in the production of color changing mug. It is located in Shenzhen, Established in 1991, at the beginning time, we only help research and development the color changing decal for other factories. We are to be true manufacturer and exporter factory of alls kinds of magic mug in 2012, we have been one of the first domestic company to show the color changing mug to the world. As one of the earliest enterprises in China in color changing water cups, we have over 18yrs rich experiences with 100-200 workers factory, , we do have a professional R&D department at your service!