The first weeks are the toughest as you have to establish these new healthy habits, as you have to get used to telling yourself no and being prepared and lots more. Get through them any way that you can. Recognize that there IS an initial, temporary discomfort stage as you try and break *bad* habits.
As far as the movie goes, how about bring your daughter something along to drink as well? She doesn't need soda either! There is zero value in it. It's never too early for her to learn good habits.
I look forward to hearing of your continued progress.
