This new colour changing vinyl is amazing, it changes colour with the temperature of its environment. The cold vinyl is a frosted, translucent white when it is at room temperature but when the temperature goes below approx 15°C it turns blue and then back to frosty white when it warms back up. The hot vinyl is red while at room temperature but when the temperature goes above approx 80°C it turns yellow and then back to red again when it warms up. This vinyl has so many unique possibilities with your projects. It would look great on your glass cup, mug or pitcher projects. It is recommended to hand wash, as it is not dishwasher safe and would be best on indoor projects, as it would not hold up well outdoors.