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Far from the fanfare of its Los Angeles launch event—or buzz-generating ad during American Idol—the development of Frito-Lay ’s 100% compostable bag for the SunChips brand represented a development slog for engineers at the firm and its supplier partners. Tony Knoerzer, VP packaging and sustainability at Pepsico’s Frito-Lay division, offered some insight into the challenges the company overcame …