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Type in "газировка" in Yandex and see how many quality quotes will pop up where this word means sweet soda.

By quality results I mean quotes from books/reputable media as opposed to posts in web...

it's probably better (but only because actual lemonade is not really popular in Russia).

But pepsi and coke are carbonated water too, or aren't they? Of course it's more common to call them "пепси" and "кола" but that doesn't change their substance.[/quote]

Yep, it's carbonated water...

er... maybe I haven't been home for too long, but for me, "gazirovka" means one and only one thing -- that is, carbonated water.
Definitely not pepsi or coke.
I am not actually sure if there is a...