with eyes open wide
This is a step in the right direction.
I believe that behavior change is possible, though just because bottled water isn’t available in “public areas” doesn’t mean they can’t walk across the street and buy it at a private supermarket. So it will be interesting to see how this catches on.
As a few people noted in the comment section of this article (link below), many people would probably opt for a soda drink since there is no bottled water available. Hopefully after once or twice of this, they would start remembering to bring their own bottles.