I make these all the time with Tommy Bahama light rum and Sprite. The Sprite makes it light and refreshing. The grenadine makes it look like a Shirley Temple. So good by the pool!
Used Bacardi Rum, Rose's grenadine and Pepsi-Cola; itasted a bit like medicine. I added more cola, but it didn't help.
This is a little sweet, but it IS smooth and tasty! I did cut back on the Coke that I used for thisw drink. I'd make this again. Thanks for the idea of this!