I grew up in the South (New Mexico and then Texas), and it was normal to be asked: "Honey, what kind of Coke do you want?"
It was not unusual to say, "Sprite" or "Orange" or "Root Beer". Now that I live in Nebraska, it's funny but no one has ever asked me what kind of Coke I want. To answer the question - I drink Coke because it's the real thing!