Why do you feel the need to take a bottlew with teat from her?
My daughter was still drinking her nighttime milk from bottles with teats when 3, so you've nothing to worry about. My health visitor (during her 2 year old check) made a face like a cats bum when i told her.
It did occasionally niggle at me, but I reasoned that whilst she was drinking milk which is obviously good for her, I really couldn't give a stuff what she drank it from!
She weaned herself off bottles when she was about....3 and a half, far better this way than nightime becoming stressful for you and her.
Seriously, it's such a little thing, yours is still a baby- don't worry about it, if she wants her bottle- let her have it.