You are correct that distilled and reverse osmosis water is bad for you because it will be up to 200 times more acidic than bottled water, however, to date, the best bottled water available is Fiji, which, while advertised as alkaline, by the time it arrives from its source across the pacific it has degraded severly and, when tested, is at a neutral pH at best. That is only to say that it is not adding to the issue of over acidification of the body, the primary cause of ill health in humans.
The only healthy water is alkaline Ionized Water and the only way to get it is to buy your own ionizer at home. To make an informed decision, go to compareionizers.com or lifeionizers.com - I'd be glad to help you in your education process.