Thermal Change powder is color to color change. When the surface of the powder gets hot/warm or hot to cold it will change from one color to another color. The cold to warm powder types of cups are really good for the coffee, tea and hot coco drinkers. I also have the thermal change that goes from hot to cold and is also color to color.
Please Choose ONLY 1 of the OPTIONS!! Please Note All Tumblers take 1 to 2 weeks to complete.