My DD1 never took a bottle. We ended up using Avent sippy cups for her instead (she was closer to 6 months, mind you, but it might work). To get her to get the idea, I remove the no-spill part and showed her with just water. First me sucking and then offering it to her really cautiously. She got the idea fairly quickly. She wouldn't take tons, but it didn't upset her the way a bottle did. With DD2 we had a similar problem and ended up using Nuby sippy cups which have a rubber spout and when you sort of gnaw on them, it lets the fluid through. Not sure if it'll help... I also personally preferred getting them used to the new equipment when they WEREN'T starving - less threatening. I'd just offer them to play around with and try with water, then breastfeed at usual times. Good luck and hugs!