Crystal wine glasses of the ordinary kitchen variety can be brought to resonance by rubbing a damp finger around the rim of the glass in a circular motion. Various speeds and even dynamics can be distinguished with enough practice. Although the instrument is not as useful in a melodic setting, it can create great pad foundations and add weight to a chord or instrument via doubling. "Tings" made from tapping the side of the glass are also useful for articulating chords and melodic phrases, with a tone similar to a glockenspiel but more open and, well, glassy.
This instrument can be found in VSCO 2.