> The US military stopped using pennies on most foreign military bases decades ago.

The stores (PX, or whatever your branch calls it) I used in Iraq used cardboard discs for all coins, including quarters. I figured it was to reduce having to ship all that metal out just so Marines could buy dip. But they're already shipping humvees and such, why not some rolls of quarters?

I kept forgetting to bring them whenever I bought something and amassed a big bag of pogs. Eventually I threw them away. That's probably the real reason. All transactions suddenly round up to the dollar!