Keep the change!!! What is your limit?
Today I went through a drive-thru and my total came up to $7.94. I handed the clerk $8 and she immediately said "Thank you" and shut the window.
I waited there for another 30 seconds or so and she opened the window and said "pull forward please"
I asked for my $0.06 and she kind of rolled her eyes but gave it to me.
Personally i would have even waiter for a penny.
My wife and I rarely ever spend change as we save any loose change we get each year and every year cash it in for our anniversary date night. Its added up to anywhere between $300-$500 a year.
A side note, but kind of the same topic.
I absolutely hate when I go to a restaurant and pay my bill and the waitress brings me back my change, minus the coins. Say my change should be $4.14 but she brings me back $4...thinking ill most likely leave the $0.14 anyway.....this is a quick way to get a $0 tip from me!!!
Whereas if she'd bring me back exact change she'd get a normal tip, and I've even tipped more than what i normally would if they round it up (say its $4.89 but they give me $5)