I'm trying to get my 3 1/2 month old used to taking pumped breastmilk from a bottle, but he wants no part of it. My husband and my mother have both tried feeding him while I leave the apartment and he just cries and cries. I've been using the Medela bottles. Any suggestions? Has anyone had luck with other brands of bottles? I'm going back to work in a few weeks and this is really worrying me.