From the website:
"The etchings on the glasses are musical notations that correspond to the level of the liquid — when the user drinks to D for example, she or he may run a finger along the rim of a glass to create its lush, sonorous note.
Or, for the more percussive partier, the same note will ring out with a gentle rap of her or his utensil on the side of the glass.
Each glass covers a full 12-note octave from A flat to G.
Glasses measure 8.46"H x 3.54"Ø and hold 13.5 oz.
Made in Austria from lead-free crystal."
Set of two: $45 (wine not included).