We've seen some pretty ridiculous underwear, like the iPod-friendly, iGroove panties and iBoxers, or the solar powered bikini and one-piece. But the following two-piece takes the cake for being the most outrageous undergarment worn by a woman—or any human for that matter.

Pink Tentacle came across the Japanese eco-friendly "Solar Power Bra" which aims to promote clean energy and raise eco-awareness.

The cotton bra itself features a waist-mounted solar panel that can recharge your gear or power a small electronic LED display if you feel like conveying a message. Since this is a bra after all, and not the Victoria Secret kind, the bust has been fitted with reusable bra "cups" that can hold drinks as well as increase bust size. These cups are also there to reduce the use of aluminum cans and plastic bottles.

The concept design is not really something you'll ever see beyond this post, but it sure has caught the attention of many bloggers and is doing its job of getting people to think about the environment.