Since the parent comment says "Germany" I can say with confidence: We have both, so that qualifier is not true unless you specifically buy exactly carbonated water. It is true though that for whatever reason that I just cannot comprehend the majority of water sold in bottles in this country (Germany) is carbonated. nor can I understand why so much of it is sold - tap water is very good in most places. I know a water engineer at the local municipal water company and she too only drinks tap water. On the other hand so many Germans are extremely fixated on price, it's even more incomprehensible how irrational it is that my fellow Germans buy so much bottled water. I googled for "why do Germans buy bottled water instead of tap water" and unsurprisingly found that I'm not the first one to ask that question (first link of several, as an example, which sums it up pretty well: https://www.telegraph.co.uk/expat/expatlife/10661118/Why-do-...).
Oh and if somebody asks about "but what about chlorinated tap water" - that is less common in Germany. I cannot detect anything but "water" in the places I visit in various German states. Anyone concerned about such things can get a water filter, they are plentiful in supermarkets, mostly these types: https://i.pinimg.com/736x/31/ed/ff/31edff1af777601ac16d33292...
The website of my own municipal water company (of a large Bavarian city) says water is chlorinated only when it is absolutely necessary, and that if they do it they will also stop as soon as possible. So that is a temporary measure when something happened but not usually done.
> It is true though that for whatever reason that I just cannot comprehend the majority of water sold in bottles in this country (Germany) is carbonated.
When I was a kid, my parents would only buy carbonated water. Still water was available from the tap. Today, I stopped buying even that, I can carbonate my water myself.
As to why we buy so much bottled water: Marketing. Some waters have a distinct taste, but at least for me, it’s just a matter of getting used to a different tap water taste when moving.
There may exist non-carbonated water in glass bottles, but non-carbonated water isn't that popular: In 2014, only 13% of water sold was 'still', but only 23% all water sold was sold in glass bottles [1]. Given that most still water comes in plastic bottles, I'd say the amount of still water sold in glass bottles is rather small.
