Lots of perfectly nice things we drink are mildly acidic - orange juice, anything with vitamin C - that's citric acid - doesn't that sound lots more sinister? Bet the ants of the highways are happy when Coke is used to clean up oil stains ... and the carbonation has to account for some of the corrosive stuff, too, doesn't it?

I, for one, drink Fruit 2-O - a lot of it, every day. I am well hydrated.