In these days of advanced spy gadgets, it is easy to forget the basics. Remember the old days, when a book had a secret compartment for something to be smuggled in.
Well, have a look at these Hollow Spy Coins, that have a secret compartment inside. Once closed, it is virtually impossible to distinguish these spy coins from a regular coin. It is said that during the Cold War, spies from both the East and West used Hollow Coins to ferry secret messages, suicide poisons, and microfilms undetected.
Think of the possibilities - a secret note to your lover, or a micro SD card (which the device is capable of holding) under unsuspecting eyes -- you can give away loads of data to whoever you want.
You can also buy this from Amazon:
