She is 2 1/2. Get rid of the bottle starting tomorrow night. It is a weekend so it will not be as hard, if it disrupts some of the sleep..
Start talking about it today. "You are such a big girl. I like how you eat like a big girl with your fork."
"You are a big girl., I like how you sit in your car seat."
" You are a big girl, I like how you put on your own shoes.. "
"You are a big girl, I like how you are a big helper. "
"Big girls do not use bottles, they use big girl cups."
Then tomorrow THROW all bottle stuff away into the outdoor trash can so they are all gone.
If your daughter looks all through the house, there will not be any bottles.. ,
As the other moms suggested, give her a cup of milk before bed and brush her teeth.
Sure she could be a little upset, she may be a lot upset, but you can be strong.
I lead up to our daughter only using sippy cups once she turned 1. She never did bat an eye about it. I had lead up to it.. She had picked out her own cup..