I buy bottled water as a drink on the go. I'm perfectly happy drinking tap water that's been bottled. If I've got the choice between a fizzy drink or water, I usually prefer water, thanks.
When I was a kid in the 80s there used to be public water fountains, now there aren't. I think we're all a little more germ paranoid these days too, so i doubt people would even use them if given a choice to buy a bottle of water for a £1 or use a fountain for free.
I mean the guy argues against himself:
Compared with the water needs of agriculture and energy production, the bottled water business is barely responsible for a trickle; in Michigan, it accounts for less than 1 percent of total water usage
The only thing I wish was better was that it wasn't plastic bottles, but I always recycle them if I can.