Hun if it ain't broke I wouldn't stress too much, she's still little. FWIW DD was nearly 4 when she dropped hers, and DS dropped his at around 3. Both STILL have a bottle when they are at my mums place DD is nearly 5 and DS is 3.5!! We transitioned slowly by having a bottle on the couch with story then brushing teeth(as that was my biggest problem with it) and then moved to a cup of milk which they have now. Maybe a new "special" milk cup would help her transition instead of a bottle and you can pump up her being a big girl and not needing a bottle anymore, and if she still wants the physical bottle just leave water in it. Both of mine have their water bottles with them as they sometimes get thirsty in the night! Good luck!!