Since 1911, Lancaster-based Novelty Manufacturing Co. has grown from a small trinket maker into an American manufacturer of plastic consumer goods, including gardening products and home-improvement solutions. Its NMC Contract Molding operation also helps customers take plastic products from industrial design and pre-production through molding, assembly, and distribution. The company’s long history includes the Countryside planter line, developed by Melinda Winger and her father in the early 1990s.