Developed by Mossad, the Israeli intelligence service, this spy pen contains heat sensitive ink that can be made to disappear and reappear in times of need.
This spy pen is perfect for all secret writing needs. Once you’ve penned your message simply heat the paper with a hair dryer to see the heat sensitive ink disappear. The paper will now simply look like a blank sheet. Your message can then be passed safely to your confident who can place it in a freezer to make the message reappear.
The spy pen’s ink can be transformed back and forth between visible and invisible as many times as you like.