I disagree about needing versus not needing milk. Every child needs milk. In the United States, most adults don't get enough calcium, children are increasingly victims of their parents opinion on this - so ask your doctor whether she needs milk or not.
Now - on to the real issue - why is your child still on the bottle?
It's not that SHE won't give up the bottle - it's that you don't have enough strength to give it up.
Here's what we did with my 12 month old when it was time to give up the bottle: we walked to the recycling can, threw all her bottles in and said, "No more bottle - you're a big girl now."
That was the end.
Next day she went and looked in the can. I, of course, had emptied it immediately. She said, "Bottle bye-bye?" I said, "yep!"
That was the end of that.
Remember - YOU ARE THE BOSS - starting the habit of letting you children whine you into doing things is going to be a horrible pattern to begin. Once it starts, you are stuck with it. That means when they misbehave, when they want something, they will try to control you the same way she is doing now. Don't let it continue or you will be regretful later.
Good luck,
S