IIRC the last plane I rode on(Civilian), the water came out of a .5l bottle, just like a soda. The sinks in the latrenes are labled "Non-Potable", and if you ask they will open a bottle and hand it to you. When I flew the food court was after the security checkpoint and You were allowed to buy food and drink to make up for crappy service on the flight.
Gotta agree with Garand, the booze will kill whatever ails ya, and you won't be tense when you run out of altitude. Gotta love airports, only place where you give up over 50% of the bill of rights when you walk in. And no, I usually don't have the option of driving, when I gotta get someplace it's always short notice.