Mostly, I just make it up as I go along...
But here is the word of one of your shill friends in the bottled water industry :
http://www.foodsafetymagazine.com/magazine-archive1/aprilmay-2016/polyethylene-terephthalate-the-safety-of-bottled-water/
With the exception of the 40%mix of tap, which I included to mean that some are just reverse osmosis tap water, the article agrees with everything I said. Bottled water has standards, sure, but those components are in there. Including the fact that BPA bottles had to be discontinued due to poisoning us. That's the point made. 
In addition , other than some situations, how do live with adding to the massive plastic catastrophe if you can avoid doing so? So I suggested reverse osmosis.
I cop to being a little loose on my standards of referencing just this once :)