Nope, it's not what you are probably thinking. If I remember correctly when we went to France they asked us if we wanted our water with gas or without. This means carbonated water or not.
Since moving to Japan, I've stopped drinking soda. But, there have been times when I want a little fizzy something to drink--but don't want to fall back into drinking soda...so, I've found carbonated water...I know, to buy water is a bit crazy and can be expensive.
Luckily, we have 100 yen shops here. This means EVERY item in the store is only $1 each (it is amazing what they sell in these stores these days!)...I found these imports in the 100 yen shop...if you were to purchase these in the supermarket you can expect to pay up to 300 yen ($3) a bottle.
From left to right: San Benedetto (Italy), Vals (France), Brio Blu (Italy).