I live in Argentina, so that could be why I like it, though, we drink a lot of sour things like mate, or some vermuths that are very sour, or fernet, or terma which is like a sour soda, we also drink sparkling water along with coffee, I don't know if that's what other countries do.
Which one? I assume the former, as Fanta is a global brand… Polar is a brand of sparkling water, and one flavor is orange vanilla, a beloved flavor here in the States (popularized by orange vanilla popsicles, called “creamsicles”). I like it because It’s a good reproduction of a classic orange soda flavor, without the cloying sweetness of soda.