Why Zimbabwe uses chocolate instead of coins.
A few years ago, Zimbabwe dumped its own currency and embraced US dollars to save itself from rampant hyperinflation.
Weirdly, the over-used greenbacks are becoming filthy and are falling apart. (The picture below shows a regular US dollar on left, and a typical dollar in Zambabwe on right.) There are no coins, so the country has started using chocolate and other snacks instead of coins to make change. http://www.npr.org/2012/05/25/153425459/how-crumbling-u-s-dollars-bailed-out-zimbabwe