From Custom Starbucks ceramic coffee mugs,Although the paint on the inner wall of the ceramic mug is bright, there are heavy metals such as lead, mercury and cadmium in the glaze. Among them, cadmium and lead are easy to cause liver or other visceral poisoning, while Mercury can cause liver and kidney sclerosis. The more the glaze color, the brighter the color, the more lead, cadmium and other compounds.

When choosing ceramic mugs, don't pay too much attention to the pattern, especially the bowls with painted inner walls. The newly purchased wholesale ceramic coffee mugs can be soaked in vinegar for 2-3 hours to dissolve the harmful substances in the colored glaze. In addition, color porcelain should not be heated in microwave oven.