DD#1 was bottle fed from 7 months as I went back to work full time and she was about the same age as your little one when I stopped the bedtime bottle but it took a while and eventually we discussed it and as a friend had just had a baby we gave all Jess' bottles to the baby and made a big thing about it. At this age you can talk about it a bit at least although Jess was not happy about giving up the bottle at least giving them to a tiny baby cause she was "a big girl" worked for us. DD#2 was bf until one and went straight to a cup so I avoided the whole problem with her LOL.