A Glass Harp isn’t a harp at all actually, it’s a series of wine glasses that put out some of the most mind boggling music you’ve ever heard.
The duo in this video is actually quite famous after I dug in a bit more. Check out their site, GlassDuo, for more amazing performances.
Watch this rendition of “Sugar Plum Fairy” by two Glass Harpists. At least, I think that’s what they call themselves.