Gliding a finger across the rim of a wine glass can cause it to sing, but what tune? The Musical Glass answers that question. Marked along the side of the glass are measurements that correspond to how much liquid is required for each particular note. Now, instead of producing just a beautiful note floating in the air, a specific beautiful note can be made to float in the air. Forget ounces: music is the new way to measure wine. Fill mine to A-flat please.