With so many brands of bottled “water” which do you drink?

Whatever is available in the rare instance I don't have my self cleaning refillable.

Unfortunately my refillable tries to kill me on occasion with UV light, because the safety shutoff doesn't seem to work on either brand I've tried(I think it actually might just dim rather than turn off on one version), and I've seen more than the zero UVC I'd like to see when it turns on while the lid is off, so I might have to go back to non self cleaning.

Our species has survived for hundreds of thousands of years on the water from filthy puddles and the occasional rat. Tap water is fine for me.

I don't. I drink tap water, which has higher legal quality requirements in civilized countries than any bottled water does.

Bottled water is only useful in poor countries. In rich countries, it's a scam for chumps, like $500 "audio quality" ethernet cables or lottery tickets.

The cheapest.