Hipster accessorizing meets portable sound in San Francisco-based designer Mr. SiMo’s BoomCase series of vintage suitcases modified to contain (and show-off) speakers, batteries and headphone jacks.

The suitcase sound systems can be plugged straight into an outlet, or carry on singing for 7 hours or more from a single charge. They will stream music from iPods and Iphones and any other media player that has a headphone jack, and Mr. SiMo, also knows as Dominic Odbert, can even add an iPod or USB charging dock.

The BoomCases come with two, three, or even five speakers included, and prices start at $250. No word yet on sound quality, but Odbert is something of an audio fanatic, so it should be good.