I failed in this aspect. baby didn't take to bottle totally. I was told by experienced friends that the window period to intro bottle is actually around 6 wks old. If you missed this, chances are you will find it difficult to intro the bottle later.
I tried every brand on the market, from the no brand ones to the branded ones like Dr Brown, etc. No use as far as my son is concerned. In the end, he was fed with syringe and spoon till he reached 5 mths old.