COLOR CHANGING TRAVEL UMBRELLA

This umbrella could feature a zebra or rain drops that change in vivid colors when wet, reached with a particular ink (hydrochromic ink). When the umbrella is dry, the printed image is white, but the zebra and rain drops become vibrating on contact with the water.

6. HOGWARTS COLOR-CHANGING UMBRELLA FROM HARRY POTTER

This octagonal umbrella with changing colours presents detailed photographs of the emblems of the Hogwarts School of Witchcraft in black and white. The magic happens when you go out during the rain and the umbrella gets wet; the ridges turn to show their bright colours.