E.W.
I transitioned my kids from the bottle using Nuby sippy cups with a silicone spout. It's in between a bottle and a sippy cup. If you haven't seen them, here is what they are. You can get them from any Walmart: http://www.amazon.com/gp/product/B000ZPM5G2/ref=pd_lpo_k2...
Bottles seem to be a comfort thing, I can see why she would be reluctant to let go of the milk specifically. Try a gradual transition with the milk; give it to her in the flexible top sippy and then try a regular sippy, a month for each. When it's a comfort item, sometimes it takes a slow gradual process. The same thing applies to the binky. Try to find other objects they use for comfort and encourage the use of that over the bottle or binky as well. It's hard for everyone to let go of their comfort items, just be patient and loving and it will happen. Good luck!