I have an 18 year old and a 14 year old- I should be old hat at all this by now, right? And I thought I was until I started reading all this new information about bottles... I plan on breast feeding, but am having twins and let's be realistic, some kind of supplementing will be happening at some point. So I want to be prepared, pick up a dozen bottles. It used to be grab one of those cute little pastel plastic NUK bottles from the local grocery- but now there's RULES to this. Is all of this really necessary? BPA free- Silicone not Latex nipples- Glass not plastic. Opinions?