|Subject: Re: Last minute Paris help|
You'll have no problem getting milk. All the MonoPrix stores have grocery dept's and there are supermarkets like Champignon around.
You can buy fresh or you can buy some of the sealed milk (like the Parmalat we get here in the US) that has a long shelf life until it's opened. Probably good to keep a couple of these around for the few times when the fresh milk is a bit more difficult to get.
If you're staying in a small hotel, chances are that there's a refrigerator the hotel will let you use and have access to.
Sorry I can't help w/ the stroller question.