I had this when I went back to work, mine was about 7 months. She Would Not Take The Bottle and I was worried I wouldn't be able to go back to work.

All I can say is persist, persist, persist and eventually they'll accidentally have a suck, realise the bottle has food in it and that will be it. But don't push for too long, try just before you feed, maybe break mid-feed when bubs is contented and try and slip the bottle in, but don't push until you have a screaming baby.