But don't you know you *have* to introduce a bottle as soon as possible, in case they won't take it later? (I figure it's easier never to use bottles, but I think I'm in the minority there)
With DS we made a point of giving him water - and fretting that he ddin't have much - from 6 months. DD gets water if she wants it, but still gets most of her fluids from milk. It seems to work fine, so why mess with it?