i have just started expressing to allow me the odd feed off and to have an emergency supply in the freezer. Im a wee bit flummoxed by all this technical stuff i thought i wouldnt have to think about while ebf! I have a manual pump, do i need to sterilize everything every time i use it? Im trying to buy storage bags online, will they go on to the pump or will i have to fill the bottle, then decant it? How much is a 2 month old likely to need per feed? tia!