[quote=bluewaav]Yeah, a water bottle, depending on your trip . . . Not if you're flying, at least not at the beginning of the trip (or the end). I brought a water bottle on my last trip, to keep hydrated of course. Airplanes tend to be really dry places. Well, the 'no liquids' rules about flying made me dump the water out of my water bottle.
I always take a bottle of water on board. There's no problem once you've been through the third degree. On the other side, just buy a bottle and stuff it in your pocket. No matter how expensive it is, if you've got no free food or drink on the flight - it'll be cheaper than on-board 'Offers'.
A lot of airports have water fountains. You could just take an empty bottle through the security check and then fill it up on the other end. Or if the water quality is good enough, use a tap in the bathrooms. I tend to think that airlines have an obligation to provide you with water on the flight though. Charging for it seems an affront.