I bought this for my coffee maker to keep all the impurity out (calcium) from the tap water and the other stuff we don't want in or body system.  It's been three years now and coffee maker is happy and so am I.  You won't believe me what the Water from the city water companies considers safe drinking water and this ZeroWater takes every impurity out.  It's safe for the whole family.  I've even bought the travel glass to take with me when I go to friends and families houses.  Thanks ZeroWater for producing a great produce for those who are concern with health an wellness.