Just add some Lemon juice (you can get it at the story without any lemon flavour in it even) to get it to be more acidic to your taste. And there are plenty of options with minerals as well. There is no need to put more plastic in our oceans simply because you make yourself believe that certain waters are "special!".
Yes there can be a taste difference, mostly with how hard or soft the water is (calcium mostly). But it is minute, and not worth the hassle of eating fish with tiny granules of plastic in them or giving animals horrible slow deaths by undigested plastic in their stomachs!
That is not even putting into account the energy required to bottle all that generic water. And not even taking into account that trucks need to deliver all that bottled water to your store!
Water can go via pipelines far cheaper and efficient than any truck can deliver it. Same with irrigation. Irrigation is fine, but you don't put out a lawn in the middle of the desert, that is simply wasteful and not needed. Rather than buying bottled water or having a lawn in Las Vegas? Donate that money to charities that help bringing water to areas where there are no pipelines yet or were people can't afford the infrastructure.
Or even worse, where it has been privatized and collecting rainwater has been deemed illegal (like in some South American Countries, where US corporations made it illegal to collect rainwater! I KID YOU NOT!
https://jamesptaylor.wordpress.com/2007/11/29/bolivia-bechtel-and-the-fight-for-public-water/
http://www.ncsl.org/research/environment-and-natural-resources/rainwater-harvesting.aspx (Evenin the USA it seems!) ).
Help out the people in Flint so they can get normal tap water again, by getting those damn Republicans out of office there! Help out people in Afrika by giving to charities that help make water wells and fight climate change that dries out what used to be green fertile areas. Stop buying Oil products from Shell, as they poisoned Nigeria and the water supply there.
But all with all, stop buying bottled water unless you need it (like when you live in Flint or another country/state where the tap water is contaminated or not available). That money is better spend on different things.
I know this is preachy, I just really am starting to get prissy about how Coca Cola and big corporations are able to capitalize what is a basic necessity and for all living things!