The bowls you see in the picture above are actually speakers. Designer Casey Lin has created a fully functioning set of speakers that look like a pair of clear glass bowls. She calls them Timbre Speakers.

The wooden box has surface transducers that vibrate said box, turning it into a speaker itself. The vibrations travel into bowls, which have a concave shape to amplify the sound. The bowls aren't even all the way around. You can alter both bass and treble.

Check out a video of it in action below:

[Casey Lin, Via Doornob]