The full color-changing mug is a legend among the color-changing mugs (Full color-changing mug is a mug that changes color all over except the mug handle). The full color-changing mug was first developed by a British company and applied for a technical patent regarding European and American markets. In 2004, Beijing US-funded company Meikeda introduced the full color-changing mugs to explore the Chinese market. It is said that the company had to pay a high royalty regarding European and American market to British company every year. At that time, the technology of full color-changing products was already very mature. The production of high-gloss full color-changing mugs had high technical requirements for workers, coupled with the imported raw materials, so the price was relatively high. Although many factories could be able to produce full color-changing mugs, they must use expensive professional equipment and employ highly skilled production workers to produce high-quality full color-changing mugs with a certain product qualification rate. In 2006, the one-time color-changing and painting of the raw materials of the high-gloss full color-changing mug was successfully developed jointly by Zhejiang Jiangkou Coating Chemical Factory and Zhejiang University, which played a key role in reducing the production cost of the color-changing mug. The raw materials for the color-changing mug are not only made in China, but also from Japan and Germany. For the domestic full color-changing mug market, there is a big price difference among different manufacturers, which is caused by the inconsistent factory qualification standards of full color-changing mugs from different manufacturers and the use of different production materials. Generally speaking, the production process of the matte full color change mug is relatively simple and the cost is low, so its price is low. Due to the limited knowledge of skilled workers, bumps appear on the mug body and mug handle surface, thereby causing some non-conforming products. Other domestic manufacturers have mainly drawn on the experience of others or explored their own ways to produce this product. In 2004, there were factories in China who could stably produce all color-changing mugs and export them to other countries.