Fristaden Lab Resonance Bowl Dating back to the Han Dynasty (202 B.C. - A.D. 9), Resonance Bowls, also known as Chinese Sprouting Bowls, can demonstrate the behavior of waves. The handle's vibrations will cause the water to "sprout up", hence the object's name. Watch the water jet up or ripple around the rim as you experiment with the vibrations. This brass Resonance Bowl is 14cm tall and 38cm in diameter. It weights 1.75kg. One Year Manufacturer Warranty.