The Prison Pen
Don't get too excited, this isn't going to actually help you break out of the big house. In fact, it is meant for the contrary. This is the pen they want you to use when you're locked up.
The pen is made from a soft, flexible rubber material so that it will bend when any pressure is applied. This will make it next to impossible to stab someone with it. I guess you could always try and poke someone's eye out with it. But then you could just do that with your fingers too.
It's good to see that people are working to develop things like these to protect the guards, visitors, and even the other prisoners. Though I'm sure if MacGyver had one, he could find a dozen ways to escape and kill a man with one.
Prison Pen – Useful For Writing, Not For Shivving [via ohgizmo]