You never know when you might need money for parking meters,
lots, or toll booths. Be prepared with a small coin purse or zippered bag
in your car, perhaps in the glove compartment or seat pocket. Stock it with plenty of loose change
and a few bills, so you’re always ready, whether you’re traveling far away from home or just driving
around town.
This also gives you a "home" for any loose change that makes its way into your car, although it might
take some of the fun out of scrounging around for coffee money!