Old news. In most parts of the US, the tap water is perfectly fine to drink, so there is no need for bottled water for general use. Filling your own reusable water bottles from the tap is much less expensive (and much more environmentally friendly) than buying bottled water.
Now, if you are in a poor country with pathogens in the tap water, or in an airplane where they may not be able to scrub the water tanks completely enough, then bottled water may be necessary if you cannot boil the tap water.