They can be on bottles up to 1 hun.
If you want you can start weaning her onto a sippy cup, but thats your choice.
DD1 had a bottle for sleep til 17 months. Had FF in it right up to 12 months though.
DD2 still has milk in a pop top. Stopped with bottles at around 20 months - 2.
They should really give up the bottle when they go on normal milk, but do what ever is right for you guys.