I had the same problem with my daughter who is now three. Someone suggested I try the Cannon Bottles (you can get them from the chemist), they were ok, better than the Avent, which she wouldn't take at all, but still not fabulous. I was studying at the time and she was in creche only half a day a week so it was only 1-2 bottles they needed to try and give her, but I would say that when the baby gets hungry enough, they will take what they are offered. If you are there with boobs nearby, of course they are going to try for the one they like best!! It's amazing how different kids can be, my son, who is 4 months, on the one or two occasions when I have had to leave him with someone over a feed time and have expressed, took to the bottle without a care, no fussing, no spitting, no mess, no drama - fantastic!
Good Luck!
Danielle.
Danielle, Vic, Mum of 3