This ingenious device not only allows you to write last minute notes, but to destroy them as well. Use the Pen for messages that will only show up under ultra-violet light. If you are the worried that the baddies will see it, you can shred it instead of eating it. The pen comes with a message pad and batteries for £4.99 (~$10.00.) We can see this being used with other applications, such as destroying ATM slips or that extra receipt when your partner/spouse didn’t know you took that side trip to McDonalds on the way home from work.