I love my Zerowater fridge pitcher and its better than other well-known brands I've used. Both the pitchers and filters are widely available and my water is perfectly pure and I save by not buying cases of one-time-use bottled water.
A friend recommended the ZeroWater filter and we love it. It has five layers of filtration. The site even says it can turn wine to water (sounds backwards:). I no longer even use the filtered water from the fridge. zerowater.com