A lined pipe includes an outer layer and an inner layer. The outer layer contains crosslinked polyethylene, polypropylene, poly(1-butene), or poly(vinyl chloride). The inner layer contains poly(phenylene ether), polystyrene, and, optionally, a hydrogenated block copolymer. The inner layer exhibits low stimulation of bacterial growth. Also described are a composition exhibiting low stimulation of bacterial growth, an injection molded article, and a method of controlling microbial growth during transportation or storage of water.