I don't think I'm following you. Are you against tap water, or the way they're asking, or what? Personally, as someone with limited money that I'd prefer to spend on food rather than fancy water, I'd go for the tap water every time (and look back with nostalgia on places such as Japan where water is always provided for free, automatically, and topped up every time it gets low). ← It's the way they say "tap water," like it's a highly inferior product (compared to the $6 bottled water, of course)!