Gurney, tap water which has been through a filter which is attached to the tap of the kitchen sink. I used to buy bottled, but felt too guilty about all of the plastic bottles. I thought I wouldn't be able to stand the taste of the tap water, but with the filter I find myself craving a cool, refreshing glass.:-)

When I had congestive heart failure I was on a very strict low water intake and prescription diuretics. Talk about feeling dehydrated! Now, I am fine with a lot of water, but do still have to watch the salt so that I don't retain too much of that water.:-) Also, it is very, very dry here in the high desert. I can feel it in my skin, if I've not had enough water.