Kouichi Okamoto's Water Clock tells time with water and magnets.Inside the ceramic base are 2 rotating magnets which attract 2 balls - the red one showing the hours, the white one the minutes.
Will work with any plate, glass, combination thereof or anything that can hold water.
Product Specs
Dimensions (cm): 5H x 20W x 20D Materials: Ceramic, Polypropylene, Magnets