From what I read, you only get one.
Breastfeeding supplies needed if you will pump at work - Page 2
cool! I did not know about the storage bags. I'll definitely ask about that. very handy. Hopefully this will encourage more women to breastfeed but I kinda doubt it. I am inclined to think that the free pump benefit will be used by women who would have breastfed anyway. I think more important part of the provision in the law is the requirement that employers provide a place to pump that is private and is not a bathroom! :)