Hoʻopuka ʻia ka pepa GPPS i ka pepa PS. Hiki ke hoʻohana ʻia ka pepa hoʻolaha, paʻi, hōʻailona, LGP .Kapa ʻia ka pepa polystyene i ka pepa PMMA a i ʻole ka pepa aniani Organic.ʻO ka inoa kemika ʻo Polymethyl methacrylatecrylic.
ʻO ka pepa PS ka waiwai kino maikaʻi loa ma waena o ka plastic, ʻo ka mea nui he polymethyl methacrylate, hoʻohana nui ʻia i ka hale, hoʻolaha a me ka hoʻonaninani.