that's interesting about the sterilizer, I got one and use it all the time. I do express a little bit but for dummies as well.
Although you can't actually just use hot soapy water to clean the expressing things, that just gets the milk off, you do still need to sterilize, but the microwave ones are more convenience than anything else, you can use boiling water or milton as well, just takes a little longer than the 2 mins my microwave one takes.

My nappy bag isn't a nappy bag at all, it's a krumpler courier bag, so I will be able to use it for other things later. it is a satchel bag, but as a courier bag has extra bits to make it a backpack. While it doesn't fold out it also has waterproof lining, and lots of pockets inside.