Idea for christmas!?
 

http://www.elementfour.com/

:)

+
does produce enough water to serve as a drinkwater reservoir
needs no other basic resources than just empty air

-
relatively high energy demand
no mineralised water
cannot come up for industrial households' water demands

Of course you can do the same with a self-dug hole in the ground, a plastic sheet, a cup, some plants, the sun shining away and lots of patience - but hey: for that price it's almost a steal! ;)