Most all soda's suck now ever since HFCS.
Ya gotta have a distributor who caters to the Orthodox Jewish clientele. The soda will have real sugar 'cause HFCS ain't, you know, Kosher.
Not sure about any other flavor but the Coke® will have a yellow bottle cap.
Or else swim against the tide crossing the Rio Grande and buy your soda in Mexico...
My local Stop and Shop sells kosher Coke and Sprite for Passover. During the year it’s with the kosher food. During Passover it’s an end cap.