Currently going through this
We have spent sooo much money on different bottles, dummies and formula (also tried pumped breastmilk) to try and get my 4month old to take a bottle and she just hasn’t. Usually wouldn’t mind but I have to go back to work in the next couple of weeks with an exclusively breastfed baby. At this point her Dad has to bring her to me for feeds while I’m at work, I’m lucky he will be staying home with her though.
I think if you introduce a bottle straight away there is a higher chance of them not refusing but if you start introducing after like 6 weeks they have a preference by then and can refuse the bottle due to texture and flow.