A few ideas of things people suggested to us that we tried. The first is the one that worked best. Warm milk (not too warm, obvs) but warmer than body temp First feed of the day, when he/she is *most* hungry Let the baby play with the bottle, empty, to get used to it Try a sippy cup instead - the kind with the valve that's v slow flow Try other bottles - ours liked the nuk ones best Good luck!