Senko's ScreenMirror is a shiny, reflective surface that you attach to your iPod or cellphone to turn it into a mirror. When the backlight is off, your phone's screen becomes a high-quality mirror, showing that sun damage really does happen to young people. When the backlight is on, well, you go about your business like usual.

Somewhat useful if these were $5 each, but they're almost $20. Yeah, we'll just buy an actual mirror for $20. – Jason Chen

Product Page [Senko Style via Chip Chick via uber gizmo]