Mitengo yodulira mbewu yomaliza iyi imapangidwa ndi matabwa a mthethe wokhazikika komanso wokonda zachilengedwe. Mitengo ya mthethe ndi yomanga njere yomaliza imapangitsa kuti ikhale yamphamvu, yolimba, yokhalitsa, komanso yosagwira zikande kuposa ena. mankhwala monga BPA ndi phthalates.Ndi yabwino kwa mitundu yonse yodula, kudula.Zimaphatikizanso ngati bolodi la tchizi, bolodi la charcuterie kapena tray yotumikira.Ichi ndi mankhwala achilengedwe, omwe ali ndi zopotoka zachilengedwe mu maonekedwe ake.