blimey there are some really smug posters on this thread. I hope that it doesn't come back and bite you on the arse one day.
all this 'if you don't ever give a child anything else, they will drink water' crap is just that - pure bullshit.
as I said before, I had a child who drank just water. it was piss easy - beaker of water alongside meals, and then when I finished bf a smooth transition to water only (cow's milk intolerance so no milk).
then along came dc2, who never touched water and was always repulsed by it, even at 6 months old in that beaker-alongside-the-meal way. of course, it didn't really matter then, as I was still bf, so fluids were going in. I bf for longer than I was planning to, as no other liquids were acceptable. eventually she self weaned anyway (at nearly 2), and still no other fluids were allowed to pass her lips.
for 6 months (seriously), not a drop of fluid passed her lips willingly, and we were concerned we were making a battleground out of it all. we had tried everything by this point - different cups, beakers, bottles. playing games with water (not keen), even lots of swimming (in our paddling pool so not chemical water) and long baths in the hope that she might end up drinking some. not a chance. we managed to stave off dehydration with lots of wet foods in the diet, but again, not sustainable long term.
so we offered other drinks. it was not a case of 'I bet she'll love pure juice' and giving it to her at 6 months old. even when we offered other drinks, it took a long while to find one acceptable to her. Eventually she was ok with chocolate rice milk and pineapple juice. and she drank about 50mls a day. yes, a DAY. it took us years ot even get her to an acceptable level of drinking, let alone start thinking about watering it down.
we too had pre-school and then school insisting it was water or nothing, and had to get our GP involved to state otherwise.
it was not us pandering to the whims of a slightly fussy baby. It was w a real issue.
maybe instead of all the self-satisfied "I did it this way, and my perfect children drink water only" posts, some of you might actually start thinking 'blimey, thank god I didn't have to go through that' because believe me, it was no picnic.