A team of researchers led by Professor Sir Andre Geim demonstrated a graphene-Oxide based membrane that is impermeable to all gases and liquids (i.e. it's vacuum-tight) - but water can evaporate though it as if there's no membrane at all. This membrane can be used to remove water from a mixture or container. The team sealed a bottle of Vodka with such a membrane and this resulted in water evaporating - and the drink became stronger with time:

http://www.graphene-info.com/graphene-membranes-sealed-everything-water-can-be-used-distill-alcohol