P.S. The strange thing about my daughter was that she decided to take the bottle the night before my first day back at work and her first full day at the childminder. It was almost as if she knew!!

I had exactly the same problem with my daughter at the same age. I tried for weeks and then when she hit about 6 months one night after breast feeding her I noticed that she still seemed hungry and sucked on my finger. So I thought 'if shes sucking on my finger she might suck on a bottle' so I rushed downstairs and made one up and sure enough she drank about 3 to 4 ounces! I tried no end of different teats, bottles, milks, breastmilk etc and it made no difference and in the end she took it from the straight-forward avent one. She did it in her own time!! With my son, I didn't need to wean him until later but he was ten months old. He wouldn't take a bottle either, then one day it was really hot and I decided to try him with some cool milk in a bottle to quench his thirst (he wouldn'd drink from a cup either) and he drank it no problem! (Not before I spent a fortune on fake boob bottles and even more extravagant teats!). He went onto a cup soon after that. I think the thing is to keep trying at every feed and eventually they will give in. Good luck!