Got lots of pennies in the cup holder of your car and are too embarassed to use them at the Harvey's drive-through?
No problem. Dump those useless one-cent pieces in Montreal parking meters (the ones without the dial). I ran out of real coins and tried the neglected penny. It worked!
Sure, it will take 100 times longer than slipping in a loonie. But what else are you going to do with those useless pennies?