costco has coke with real sugar in the bottle. at least in my state MN. i would just google vintage bottle sodas in your state.

I'm throwing a 90th birthday party for my great grandmother with a vintage theme. I need a good price glass bottles of coke, diet coke, sprite etc. I'd love to do better than a dollar a bottle. That's the cheapest I've found, but I've got a large guest list. Any tips??