The most important aspect of buying a water filter pitcher is the price, be aware of the cost replacement.
You have to remember that water filter pitchers don’t remove any dissolved solids from the water, and in some cases they even add some in. Their purpose is improve the taste of water.
If you are looking for a filter that can truly remove contaminants like fluoride, chlorine, iron and others, consider an under-sink water filter with multiple stages. Reverse osmosis is one of the only ways to remove all contaminants from water other than distillation.