DS is 9.5 months old. He will take a bottle of EBM when going down for a nap when I am gone but no other time. He thinks sippy cups (and open cups) are a great toy. He loves to put water in his mouth and then spit it back out. We were having some constipation problems that I have resolved mostly. All of the recommendations were to get more water into him. But HOW do I get it in him? I have been just pouring water in his mouth when he eats solids but he will take 2-3 sips tops and maybe get a swallow in. I went to a play group for the first time and these peoples babies were drinked 9 oz bottles FULL of water <img alt="" class="inlineimg" src="http://www.mothering.com/discussions/images/smilies/yikes2.gif" style="border:0px solid;" title="yikes">:. About how much should he be drinking? Will he eventullay figure the cup out and want to drink? About what age does this occur? Thanks so much for any help.