Ha I take like $60-100 bucks out of my check a week for daily food/pop/etc expenses. Then while at work I only hand the clerks bills, at the end of the day I empty my pockets and put the change in my jars. After work, I have changed/showered and when I go places I have already emptied my change out of my pockets so I hand the clerks bills.
I rarely use change when I'm shopping, so it builds up pretty quick.