Bone conduction audio, retainers, and shiny hip-hop teeth grills aren't new inventions, but tech hacker Aisen Caro Chacin had the clever idea to put them all together.
The Play-A-Grill MP3 player prototype fits in your mouth like a retainer, shines on the outside like a precious metal rap grill, and plays music through bone conduction through your teeth.
Some of the hardware actually sits outside the mouth, so you have to deal with wires extending from your teeth. It's not all self-contained. To get the best sound, you have to plug your ears, but video of test subjects shows them bopping along to the beat only they can hear.
The volume, forward, and backward buttons are built into the retainer-style mouthpiece, so you can trigger the commands with tongue pressure.
The front of the Play-A-Grill goes all in with the bling, showing off shiny metal and gems to the world.
Admittedly, this prototype is on the bizarre side, but it could have some practical use for people who don't have control of their hands to operate a traditional MP3 player.
(Via Bit Rebels)