With all the range of beers and spirits, it is amazing how bottled water is not sold in any of the bars of the Union. I know you give away tap water, but it is hard water and not as good as filtered, not even the free filters at the Uni. Water will not expire, so you could have a small stack of bottled water and there are even some nice ones that come in a glass bottle and in different volumes. I am pretty sure that making them available is also an statement of the priorities of the Union.