we changed DDs bedtime routine at around 13 months to accommodate the sippy cup instead of BF - you could easily do the same with bottle. instead of bath, read, feed, cuddle, bed, we did bath, read + sippy, BF, cuddle, bed. I stopped offering the BF after 1 week of introducing sippy, and she complained twice, but we just distracted & kept offering the sippy cup of milk, with plenty of talk about being such a 'big girl' (etc!). We also changed the location of the feed; instead of BFing in her bedroom, moved it to the living room, which helped ease the transition. haven't looked back!
HTH :-)