From our friends at Gray Duck: We are proud to bring you three flavors of what we know are the cleanest, most brightly flavored, balanced and completely un-junked seltzers on the market. How do we know this? After conducting over a year of market research, and tasting hundreds of seltzers, we developed a process of brewing and filtration that separates the taste of Gray Duck Spirited Seltzer from all others. Simply put, our seltzer is the most purely natural tasting…