what u gotta pay attention is that u may not b able to handcarry it when flying. There was a recent case a mom got her milk trashed at heathrow stirring up widespread protest. n u gotta prepare adequate equipment. Say storage bags, boxes to put the packs in, ice pack, etc etc. I usually use small bottles when pumping then store milk in bigger bottles for chilling to the same temperature for consolidation into pack of 6oz.