Black Ink Disappearing Ink-Invisible Ink Pen

Now you see it, now you don’t! The Invisible Ink Pen works and writes just like any other pen, except, in about 2-3 hours, the ink will have vanished. This ultra-cool Invisible Ink Pen is a must-have trick for any prankster. Or simply use it for added security. Write what you want, but in a few hours, it will have vanished into thin air.