ROLLING MEADOW, Ill. -- The eight largest paperboard container manufacturers, representing 95% of the market, have formed a task force to develop a standard footprint for produce containers that incorporates interlocking, stackability features. The working group, organized by the Fibre Box Assocition, here, has been visiting retailers, wholesalers and grower/shippers to determine what dimensions the standard box will take. The decision will be announced Oct. 27, during the Produce Marketing Association's annual convention and exposition in Atlanta.