These smooth-stepping tumblers are brimming with visual music. The swaying, paint-like embellishment are actually hand applied using vibrantly colored glass that is fused to the cup. Not only does the process create a subtle texture in your hands, but it also ensures that the colors will never fade or wash off. Each glass in the set of 4 has its own hue, making them easy to distinguish when you're having a ball with guests. Handmade in Italy.