Dunkin’ Donuts to eliminate all polystyrene foam cups in its global supply chain beginning in spring 2018   New double-walled paper cups to phase into U.S. restaurants beginning spring 2018 CANTON, MA, 2018-Feb-08 — /EPR Retail News/ — As part of its commitment to serve both people and the planet responsibly, Dunkin’ Donuts, a leading retailer of hot,…