I go back to work when my baby is four months old. I am planning to continue expressing at work and giving my son EBM but i really want to chose the most appropriate bottle to avoid confusion. I went back at 6 months with my DS2 and he was able to have a soft beaker of EBM so we never did bottles with him, and with my DS1 i had him on formula so no risk of confusion. I suspect 4 months is too young to use a beaker, so i need a bottle for him. any advice or experience would be appreciated!