C.
Sounds like by playing with it she's not real attached to it, so you could go ahead and neglect to have it available. If you find she IS attached to it, gradually lessen the amount in the bottle until it is down to little or nothing and then she won't miss it anyway...that's the route we needed to take with my second son at 15 months, as he was very attached to the bottle. It made for a very smooth transition.