I have never used a nappy bag, just an oversized handbag but I think Im going to have to invest in a proper one as I have to tote around nappies, sippys, blankies etc for THREE kids come April

So what nappy bag do you have and why do you love it? Does it fit everything you need? How do you lug it around, slung on the pram/carried/stored in the basket underneath?