When I was a kid in S.C., daddy ran a country store. I heard everything but "soda" yet the map says it's 50 to 80 percent "soda" here.....people asked for soft drinks, cold drinks, drinks, cokes, coke-a-colas, Pepsi's, R-O-C coke-a-cola's. ales but never sodas.
Had a Yankee come in one day and ask if we had any sodas. I told him he had to go to the drugstore uptown to get those....LOL....I can still hear my daddy's response when I told him what the guy wanted..."DAMMIT BOY! He wanted a drink".
And the term "Dope" comes from the cotton mills. They had a guy that came around in the mills with a wagon that had drinks, candy, sandwiches, etc. on the wagon. The wagon was called "The Dope Wagon" and he usually had the small green bottle COKES on it and they were called "Dopes" by the mill hands. You could usually tell by the term "Dope" for soft drinks if a person worked in the cotton mills.