Where do you keep your spare change?

I wonder where people keep there spare change? I know some people keep there spare change in some odd or out of the way places.

I keep mine in an old five gallon water bottle. Is that the best place for it? Definitely not, but it does keep it in one place until I have a good amount to deposit in a interest bearing account.

In my car I keep it in an old plastic gum container in the center cup holder for the occasional toll roads.

And yes, your sofa cushions can count as a depository for your loose change.  So where does you change end up intentional or otherwise?