EI will give you water from the water tank if you ask for it. I know that a lot of FTers baulk at that prospect, seeing it as an almost sure recipe to catch all sorts of diseases. I personally have my doubts about that, as I don't see airlines exposing themselves to the risk of law suits that this would represent. Still, this does not in any way diminish the outrageousness of not allowing self-procured food or drink on board.