I've been exclusively breastfeeding my son since birth & he is a little over 3 months old now. Once & awhile i will pump when he sleeps all night & im super engorged. Around 6 weeks he took my breast milk from a bottle like twice (daddy fed him) . But now at 3 months we have tried to give him my breast milk from a bottle & hw just WONT take it, he will just hold his mouth open & not suck. & the bottles that come with my pump (medela brand) (which he ate from before) the nipples seem to just gag him. So we tried a couple of other brands we have in the cupboard & he doesnt like those either. The other brands seem to just let the milk run right out of the nipple hole & just fills up in his mouth!