I'm expressing milk for a few nights out next month. She says that I need to give dd a bottle of ebm or formula ('its not the end of the world to give a few') every other day or she wont be able to take from a bottle. I kind of planned to give her a bottle the night before to make sure she was ok, but when she was a couple of weeks old with perseverance she managed it. Am I being naive to think it will be the same case again? If i start giving her bottles of ebm I won't have any supplies for my escape!!