Bottle Miku is a fan-made Vocaloid character created by artist KEI as part of the 2014 'MIKU with YOU!' global treasure hunt campaign. Depicted as a tiny Hatsune Miku sealed in a glass bottle with a cork, she drifts across oceans, delivering songs and messages to fans worldwide. Her design features Miku's signature twin tails, a sailor outfit, and a translucent bottle aesthetic. Released as an official VOCALOID3 voicebank library by Yamaha and Piapro, she sings in Japanese with a cute, ethereal voice suited to her nautical theme. Bottle Miku embodies adventure and connection, inspiring fan art, PVs, and merchandise celebrating her journey from Japan to global shores.