Let me google that for you
I'm sure the management and salespeople of these companies can give you all the information about regulations, since it's their core business.
I would contact the Private Label Manufacturer Association http://plma.com/ that has trade shows with people who do contract packaging. You can also contact beverage equipment companies who have customers who use their equipment that can provide leads. More importantly than getting a product made, is what is your reason for a consumer to care about your product? Distribution is the real game selling products like this - I speak from experience having grown a successful wholesale bakery business. Read more about my background here: http://momentslater.blogspot.com/search/label/About%20Me or connect to talk via Clarity. I advise lots of small companies in this space. Jeff Slater