Depends what type of water your drinking, there is soft and hard, hard is where rainwater seeps through the ground picking up minerals as it goes through.
Soft water has very little amount of the minerals because it has come from the surface of water eg lakes or collected rainwater.
Hard water takes better because of the minerals in it, whereas soft water is said to be flat because of the little amount of minerals in it where it's from the surface of water or where it has just been through a water softener.