
She is very into fairies (faeries?!) and I kind of figured this might work. We had a little ceremony this morning in the early sunlight. I took her and some "special magic" fabric (sequin net bought as a cheap remnant off chelmsford market) into the garden, along with the elephant and the botbots. We sat in the sun and I explained how she's such a big girl now that the botbot fairy has asked me to send her bottled out to be replaced by a big-girl night-time cup.
I got sophie to say the magic words "bot bot fairy, I'm a big girl!" (or in soph's words "botbotfairy, my are big giw!") and then she had to cover the botbots with the fabric. I then led her back inside to watch Me Too on cbeebies.
once she was safely engrossed I nipped back outside and swapped both bottles for cups. I also sprinkled sugar around; it sparkled like glitter in the sun but it soluable lol. botbots have been hidden; they will be kept just in case!! I then called sophie all excited and made a big thing about the change over. she was in awe. she then insisted on phoning daddy. he made a big thing out of it too.
we got to mother and toddler group today and the lady who runs it said "hello soph, did you do anything good this weekend?" sophie said "botbotfairy! my's cup! my big giw". Lady who runs playgroup gave soph a sticker for being such a big girl which made soph's day, and the lady behind me in the queue asked if it's the same as the dummy fairy

then when we got home Nanny and Harry (jim's mum and stepdad) came over on their way home from jim's brothers' house and sophie told them off her own back, no prompting at all. I had to explain the whole botbot fairy thing and my mum in law joked that she'd practically needed a crowbar to get my hubby off the breast at age 3. Harry said he wished he'd thought of the fairy for his own daughter.
later came the real test, nap time. after a bit of a wobble and asking repeatedly for a bottle, I told her that the fairy was happy to see she's such a big girl and that it's ok to miss botbot, but another pretty baby needed her botbot to go to sleep with and so she needed to use her new cup. she accepted this and was out like a light.
bed time will be another test; it took 3 weeks of tantrums to get her in to only having botbots at nap and bed time rather than all day so I'm not expecting this to be easy; but she's happy for now at least :D