They vary in composition because they pick up different minerals at their sources. Consumer Reports says the different tastes among waters may also have to do with the bottle or container that holds the water. Consumer Reports says water should have no taste. It should be clean, lively and a little crisp. Since some waters are bottled at varied sources, they may have different tastes depending on where they were bottled.
Bottled water is cheaper in larger quantities.
It's okay to refill the bottle you use every day as long as you wash it out carefully each time you use it. Otherwise, the bacteria in your mouth can spread in the bottle. Street Cents taste-tests bottled water Consumer Reports says water should be clean, lively and a little crisp. Basically, it should taste like nothing. If the water tastes like plastic, it is carrying the flavour of the water bottle.