It may look like an ordinary pen, but the Mossad Pen from ThinkGeek is far from normal. Simply add heat and the ink disappears; add cold, it reappears — and not just once.” Product page. Video after the jump.
There is no better way to pass secret notes than the Mossad Reappearing Ink Pen. And because it’s a gel pen, you don’t need to press hard.
[Source]
October 15, 2009
Posted in: Gadgets