DD1 hasn't been breastfed for over a year but as I am now bfing DD2 I wondered about expressing a bottle a day for DD1 (I doubt she would breastfeed after such a long time and now she has a mouthful of teeth I wouldn't fancy it!!). Do I need to sterilise the pump and cups etc if expressing for a toddler? I've tried googling but all advice seems to be aimed at expressing for babies.