When the USDA introduced MyPlate last week, retiring the food pyramid as a guide to healthy eating, PR professionals and food manufacturers not only applauded the simpler design, but also recognized a fresh opportunity for companies to promote their products.

“Immediately, [manufacturers] can put the plate on their food packages,” said Mary K. Young, a registered dietician and EVP of food and nutrition communications at Edelman in Chicago. “They can start to develop tools on how their foods look on the ...