Northern Italy-based supermarket chain IPER has signed a deal to source the packaging for its fresh-food range from US firm Cargill-Dow. Minnetonka, Minn.-based Cargill-Dow produces NatureWorks PLA, a natural polymer made from corn. Mario Spezia, IPER sales director, explained: "Our goal is to offer quality products to consumers without causing a negative impact on the environment."