The Sound of Glass by Bohyun Yoon is an interesting device which creates sound through the relay of water. The device is made from a single piece of molded glass transformed into a hollow shape, giving it the ability to create different sounds.
There is also a spout on the Sound of Glass helmet with which its wearers can pour water into other helmets. The idea is to create unique sounds using the water and spouts as a form of performance art.
Photo Credits: Designboom