You shouldn't drink a lot of any of these, although in moderation (choose the ones with real sugar, not corn syrup), they can help with the occasional dyspepsia.
Cultural notes: Dr. Pepper has surpassed Pepsi as the #2 pop, then Sprite came in and knocked Pepsi down to #4.
https://notthebee.com/article/pepsi-was-just-knocked-off-the-cola-podium-as-a-new-soft-drink-takes-the-third-spot