That seems like a poor comparison to make the point, since bottled mineral water is notoriously overpriced, particularly the "high end" brands.
How does it compare to something with relatively standard prices like milk? In the US, particularly cheap beer for broke alcoholics might be $5 for a sixpack of cans, 2.1 L or approximately $2.5 per liter. Milk is something like $4 per gallon, or about $1.10 per liter. Much cheaper than the cheapest beer.
(why not buy larger bottles? I prefer small ones because I don't always want to drink an entire 750ml of fizzy water in a single day, and it goes flat if left overnight; I do buy plastic sometimes but the discount over glass is so tiny that it's not really meaningful, and I prefer glass, both due to vague uneasiness with plastic and because if I end up drinking out of the bottle rather than a cup, glass bottles feel nicer than plastic)
Seltzer often tastes gross, I'll get canned club soda if I want cheap bubbles and just don't give a fuck about plastic or whatever at the moment (cans are lined in plastic). Trouble is, the bubbly-water fad has made that shit a lot more expensive than it used to be. Could get it for like $0.20/can for a long time, now it's a lot higher and you have to hunt to find the plain version without a bunch of artificial flavor in it.
I think in some countries, water in glass bottles not a yuppie luxury product because they actually reuse (not recycle) the bottles. Sort of like what they used to do with milk in the US.
(It's more expensive than store-bought plastic bottles but about the same price as store-bought glass, with the added advantage that I know they reuse the bottles.)
Glass = yuppie... shit, I guess it's because I'm getting old and remember a time when glass was just for everyone, but that's a really weird sentiment to me. Is Coors yuppie if it's in glass bottles? Seems like this is a selective application of that notion.
Bottled water in glass specifically.