Babies are due in 5 weeks, hoping to Breast feed so haven't even thought about buying a steriliser, but work colleagues are horrified that I haven't got one. When I asked why I would need one they told me for dummies (I'm hoping not to use those as well.... At least at first). If I do have to bottle feed of course I understand I'll need yo buy the whole kit and caboodle, do I really need a steriliser from day one???