I know this has been asked before, but can I find the thread? Can I hell! 
If I'm expressing, do I need a steriliser for either the pump or bottles?
Baby is due in December and I had thought of not buying a pump, etc until breastfeeding was established. However, I'd like to start building up a stash of ebm as soon as I can, even if we don't introduce a bottle until 6 weeks. I have various health conditions and the meds I'm usually on when not pregnant I couldn't take when breastfeeding either. So I'd like to build up a stash of ebm so that if I do need to go back on meds, we don't have to switch to 100% formula straight away. So I'm getting a pump and freezer bags in advance.
Plus we're budgeting for baby stuff atm so if I'm going to get this stuff, it makes more sense financially to get it now.