必 C.disadvantage 必 more expensive than ordinary plastic price 20%higher 必 Application 必 already started 必 to be popularized 必 role 必 plastic food containers tableware road signs team cheering equipment (e.g.horns mini flags trash bags umbrellas eyeglass frames)❖ C. disadvantage ❖ more expensive than ordinary plastic / price 20% higher ❖ Application ❖ already started ❖ to be popularized ❖ role ❖ plastic food containers & tableware / road signs / team cheering equipment (e.g. horns / mini flags / trash bags / umbrellas / eyeglass frames)