colour changing umbrella

This umbrella was developed by a UK company called Squid London, and only a limited amount of them are being sold. Basically when your umbrella gets wet, it changes colours, turning a boring everyday object into a work of art.

These ones go from black and white to a colourful pattern when wet:



The secret is hydrochromatic ink, which was developed at a pen company in Japan, eventually leading to the preschool toy Aquadoodle.

Via Techeblog