As functional beverage sales surge, retailers optimize merchandising

Mark Hamstra is a freelance business writer with experience covering a range of topics and industries, including food and mass retailing, the restaurant industry, direct/mobile marketing, and technology. Before becoming a freelance business journalist, Mark spent 13 years at Supermarket News, most recently as Content Director, where he was involved in all areas of editorial planning and production for print and online. Earlier in his career he also worked as a reporter and editor at other business publications, including Financial Technology, Direct Marketing News, Nation’s Restaurant News and Drug Store News.