Not arguing against your point, but it astounds me how many airports do not have water-bottle refill stations. My home airport (SFO) does, but many in the US still do not. I feel like that sort of thing should be legally mandated, given we're not permitted to bring water through security. The paltry amount of water they give you on the flight (and at times of their choosing, not yours) is not enough to rehydrate basically anyone.