1. Melody/sound when opening the bottle 2. Various colors and design 3. sound/music/voice as the buy's option When opening the bottle, the sound activates as the opener connect the metal caps.Any music files, any length of the music file. Designing according to the buyer’s requestment.1. Melody/sound when opening the bottle.2. Various colors and design.3. sound/music/voice as the buy's option.4. ...