For the most part, people are paying for the bottle itself, not the water (naturally). Its the whole convenience of having something neatly packaged that you can throw away after you're done with it.
I can usually taste the difference between different better waters. Some of them after distinct flavors to them. For the most part, the regular jumbo packs of water don't really taste like anything and are just a method of getting hydrated and throwing the bottle away so you don't have to do the dishes or something. The ones I prefer are Mountain Valley Spring Water (my favorite), Aqua Panna and Evian.
I can usually taste the difference between different better waters. Some of them after distinct flavors to them. For the most part, the regular jumbo packs of water don't really taste like anything and are just a method of getting hydrated and throwing the bottle away so you don't have to do the dishes or something. The ones I prefer are Mountain Valley Spring Water (my favorite), Aqua Panna and Evian.