Hi L.,
I also had the same issue with my daughter. She previously took the bottle but then around 5 months, refused. Someone told me to change my energy when feeding her - I was freaking out that she wouldn't take a bottle and I knew I had to go back to work in a month so I think I had a frantic energy when feeding her. My husband too so we both made a conscious decision to change our energy when feeding her.
We also tried a few different nipples as well - we ended on the Mam nipples - they look more like a real nipple and feel less like fake silicone than most other nipples. They also happened to fit Born Free bottles so it was a win-win, as most of the funky nipples usually come on non-user friendly bottles (Adiri for example, can't put in a warmer..)
Finally we also made a decision that certain feedings, ie the afternoon feeding, would come from the bottle or she wouldn't eat, period. It seems harsh but like the LC below said, they will not starve. If she gets hungry enough, she'll take the bottle. Once you get her to take the bottle then you must keep it up though - at least one bottle every day, no matter what at least until she's fully back on board with the bottles and even then don't go for more than a day or two.
I'm still breast feeding my daughter too but it's important to be able to leave your baby with others and take time for yourself even if you're not working. I don't know why some people are giving you a hard time about that, it seems silly. Also bottle feeding allows daddy to join the party and that's always a good thing in my book. Please feel free to PM me if you have any other questions. :)
~R.