Mixing Coffee with Coca Cola?

I'm wondering if anyone has suggestions on coffee drinks that utilize Coca Cola. I have a few spare cans of Coca Cola. I don't normally drink a lot of soda, so I wanted to experiment. I tried putting a doubleshot of espresso in a 12 oz. can with ice and it tasted not so great (for some reason it seemed to highlight the bitter flavors of the espresso on what is normally a rather sweet/fruity tasting espresso). Any one have other ideas? I have vanilla ice cream too... maybe a float or a shake.. or something.