X-Ray Spray

Makes Envelopes See-Through For 30 Seconds:
 Snooping on your neighbour’s mail has never been so easy. Just spray some of this “X-Ray Spray” on the side of a sealed envelope and watch in amazement as the paper becomes semi-transparent. It’s completely temporary, as the product will evaporate after about 30 seconds, leaving the piece of mail looking completely un-tampered with.

We can’t think of any situations where the use of this product wouldn’t be either illegal, or at the very least morally reprehensible. But, hey, we don’t judge. We just think it’s pretty cool something like this even exists. It’s $15.