OK, I admit Dylan Kehde Roelofs works of art have absolutely nothing to do with audio, but they remind me of vacuum tubes. They're incandescent light bulb sculptures, but it turns out Roelofs is contemplating a move to also do audio related pieces, "I'm a bit of an audiophile myself - wait 'till you see the homemade triodes (tubes) I've been working on. Might make a nice amp someday, or just a horrible, distorted Theremin."
His current works that combine glass blowing, electrical and lighting design are incredibly beautiful. They're produced in limited editions and Roelofs' prices seem very reasonable.