You just need a couple simple ingredients, and you will have a little bit of "heaven in a cup" after a minute or two.
Here is what you need:
A can of your soda (pick your poison!), ice, coconut syrup, a lime wedge, and some half and half or heavy cream.
You'll have to play around a little bit with the ratio of coconut syrup/lime juice/soda for your taste buds. Don't start with too much coconut syrup, you can always add more! I buy the coconut syrup at Smart and Final, for right around $4. I know that the coconut flavoring can be harder to find in stores sometimes. It's also sold on Amazon.
Invite some friends over and indulge in some dirty drinks on the back patio some Summer evening!