Here's what rhymes with polystyrene.

Consider these alternatives

polypropylene / seen styrofoam / home polyethylene / seen foam / home styrene / polystyrene extruded / included polyurethane / main biodegradable / capable tableware / where polyvinyl / final fiberglass / has ethylene / seen resins / presence polycrystalline / line butadiene / polybutadiene sulfonate / late ceramic / dynamic dinnerware / where microspheres / years urethane / main curds / words propylene / seen arsenide / side bakelite / feet