Soda is becoming a bit more common in this part of the country (Minnesota) but those two are about it. Ask for something else and you'll get a strange look or something you didn't want.
When I first moved to Alabama I remember asking for a Coke at a fast food restaurant. The person behind the counter counters with: "What kind of Coke do you want?" I said. "A Coke". Reply: "You want Coke,Coke, Sprite, Dr. Pepper".