Also known as magic mugs, they can act as an indicator of water temperature. The mug’s body begins to change color when the temperature reaches 40 ℃, and the color will gradually fade away as the water is getting colder. This series of color changing mugs are available in black, blue, red, bright green, orange and magenta. This patented technology has created numerous new decoration options in the world of coffee mugs. All of our products are FDA certificated, and harmless to the human body. It is of high temperature resistance and high rub resistance. Domestic and overseas customers are welcome to visit us, and consult on and order our products. Specification Size: 3.7″ (H) x 3.2″ (OD) Imprint Area: 8.6″ x 3.7″ Packaging: 16.1″ x 12.2″ x 10.6″ Qty/Cs: 36 pcs Gross Weight: 28.6 lbs Heating Method: mug press, 180 ℃, & 15 sec. or so
