United States Gluten-free Bakery Products Market Assessment, By Type [Still Water, Sparkling Water, Functional Water, Others], By Packaging [PET Bottles, Glass Bottles, Biodegradable Packaging, Metal Cans, Others], By End-user [Individual, Commercial], By Distribution Channel [Convenience Stores, Grocery Shops, Internet Retailing, Supermarkets/Hypermarkets, Others], By Region, Opportunities, and Forecast, 2016-2030F