When travelling in India keeping hydrated is very important. I don't know if you can fully trust the tap water. Is there a few bottled water brands that have a good name and are generally trustworthy for foreigners touring India?

I know there are some problems with counterfeit bottled water, is there then a grocery chain where you can shop for bottled water with confidence that the product is real?

I'm not asking for an exhaustive list just a few brands the locals can recommend.