This U.S. industry comprises establishments primarily engaged in converting sanitary foodboard into food containers (except folding). Cross-References. Establishments primarily engaged in-- ? Manufacturing sanitary food containers of solely plastics materials--are classified in Industry Group 3261, Plastics Product Manufacturing; ? Manufacturing egg cartons, food trays, and other food containers from molded pulp--are classified in U.S. Industry 322299, All Other Converted Paper Product Manufacturing; and ? Manufacturing folding sanitary cartons--are classified in U.S. Industry 322212, Folding Paperboard Box Manufacturing.