Place a coin or other small object onto a spectators or your hand, then simply wave your hand over it and it's vanished! You can show both hands to be empty, even both your sleeves. It really has vanished!
This can be done time and time again, wherever you are. Completely impromptu.
This effect was performed by David Blaine on Street Magic.

This product is functionally similar to the Raven, only smaller, lighter, more discreet and more efficient.