well, are you still nursing? thats a good question, but if you are you shouldnt worry about anything, shes fine.
if not thats ok, however, milk is a tough thing to get used to. my son didnt like milk at all when we started him on it. so to encourage him to drink some, we added some chocolate! he drank plenty of chocolate milk. especially with breastfed babies the milk is sweeter, so chocolate milk is more close to the taste of breastmilk. my son's doctor, as well as wic, found it more important that he got the milk than whether or not chocolate was included.
i did NOT buy chocolate milk, as the stuff you buy is SO THICK!! but i just added a little and sometimes a little less ... and now he drinks plenty of milk, sometimes i feel a little too much! i usually dont give him a drink until after he has eaten, or he will drink and not eat!
good luck and i wouldnt worry too much unless there starts to be health issues or vitamin deficiency. maybe get her a multi kid vitamin or something.
i just give my son normal yogurt. he loves it. doesnt matter much to me i guess which brand i give him. he loves it all.
maybe try a bottle fairy? ? like the nuk fairy? giving bottles to little kids that dont have one? have her help you to buy fun sippy cups that she will like. theres a fine line though between saying that if she keeps spitting it out and actually needing her to drink some. maybe give her only water in the straw cups if you want her to have the sippy. and give her sippy only at the table at meals, where usually they want to drink cuz they are eating. not giving her an option of walking around with a bottle or cup will maybe help her to realize that she needs to drink what she wants at the table... and only give water between meals - again without letting her walk around with it.
my son is 18 months and he drinks all the time... so i dont really follow even my own advice about drinks only at the table.... but hes not having trouble drinking anything... so i guess i havent limited anything yet. im really working on it. he was always breastfed and still is, so we never got on the bottle at all. he went on a sippy with his solid foods when he was 7 months.... so really i think i have a different experience as you have, so what i say might not work. i just wanted to say that i dont have direct experience, i just thought those ideas that ive heard or seen in friends might help you LOL. sorry if it seems naive LOL
anyway good luck