This ON/OFF color changing cup shows different pictures when the inside fluids temperature changes.
When you see the mug it looks like a conventional coffee mug with just the letters “OFF” imprinted. The real fun starts when you start pouring hot coffee or any other hot beverage, the mug literally changes its color completely from black to white and pops up the letters “ON”.
For leisure, office, home use, more suitable for a gift as a friend will certainly be an unexpected surprise effect.
Size : 13 x 9.5 cm
Weight : 350 g