I usually drink tap water from our fridge, which has a filter on it. We often forget to change the filter, though, so who knows if it's doing any good actually filtering. I prefer that water because it comes out of the fridge fairly chilled and it's the right temperature for me without adding ice. I also use water bottles that I refill and put back in the fridge and for those I use sink tap water. I prefer the taste of our tap water to most bottled water. I do sometimes grab a bottled water when I'm on the go. If I lived in an area with bad tasting tap water (I don't like Orlando tap water, for example) I'd use bottled.