The bottom person wants to drink pool water, though in reality she would be drowning by now. Sand and water flow the same way through an hourglass, i.e. filling up the bottom. Go watch Disney's Aladdin for more info as to why this picture is stupid.
Actually it's saying that there are people literally swimming in gallons and gallons of water, while others can't even drink a single drop. You stupid, stupid guest.
Not CRYsubstance