Club soda or carbonated water!
I used to drink a lot of sodas of all kinds earlier. Later, I drastically cut down my sugar consumption to near zero after I learned of the dangers of sugar, or fructose in particular. Not a fan of artificial sweeteners at all, so I avoid diet & zero versions as well.
I still have a liking for cold, fizzy drinks, so I drink club soda or carbonated water instead of sugary sodas.