Good Morning L., You said she doesn't drink from it, is she using it like a binki or paci? Just holding it etc?
I am only assuming she isn't sucking on it, if she were her tummy would be full of air and that would be very uncomfy for her.
If that is all she is doing, let her. It's like having a favorite baby doll or blanket.Something familiar she likes.
If she wants to take it for Show N Tell, in Kindergarten well then it's a problem...lol
When we go some place now, I make Corbin 4 & Zane 2 leave any toy or Baby ( little critter with a small blanket attached at the head) in the car. They can have them when we get in the car again. This keeps me from having to pick them up with Zane throws them or drops them for fun. Zane went 3 hours last night at a Surprise party for my dad with out his Baby. Did just fine.
I think ( anyway-It's early still lol )
As long as she is only carry it in the house, not using it as a paci or to drink from allow her to. She will get rid of it on her own. Grab one of her baby dolls and let her use the bottle to feed her baby doll.
God Bless you and your little Princess
K. Nana of 5
PS there are alot worse things down the line.. ;)