Upper Great Lakes region...soda and pop seem interchangeable here. I'll say "soda pop" once in a while for the halibut.
I either call it 'fizzy drink' or by it's individual name eg coke is coke, ginger beer is ginger beer etc.. and I'm from NZ
^^^ ha, yeah, totally. Tonic is the one with gin. but Soda is different too - Soda here (New Zealand) is soda water - as in carbonated water with bicarbonate of soda in it. It's great for hangovers. So I guess I have to stick with fizzy drink as a generic name for carbonated beverages