I know you're supposed to have at least 8 "glasses" of water a day, but how much water is in a glass? Eight fluid ounces? Sixteen fluid ounces? I've been drinking 16 fl oz bottles of Fruit2O, since I can't stand the taste of plain water. (0 calories, o fat, 5 mg sodium, 0g sugars, 0g protein). I'm up to two a day.