Umzi-mveliso womthombo wenza iibhokisi zeplastiki kumashishini ahlukeneyo afana nokupakishwa kokutya, ukugcinwa kweekhemikhali, kunye nomboniso wokuthengisa. Umzi-mveliso usebenzisa iindlela eziphambili zokubumba iinaliti ukuvelisa iibhokisi ezikumgangatho ophezulu kunye nezizinzileyo ezihlangabezana neemfuno ezithile zabathengi babo. Ukongeza kubungakanani obuqhelekileyo kunye noyilo, banikezela ngeendlela ezilungelelanisiweyo ukulungiselela ubungakanani bemveliso eyodwa kunye neemfuno zophawu. Ngokuzibophelela ekuzinzeni, umzi-mveliso usebenzisa izinto ezihlaziyiweyo kwaye usebenzise iindlela zokonga amandla kwinkqubo yabo yokuvelisa. Ngaphaya koko, baqinisekisa ukuthotyelwa kwemigaqo yoshishino kunye nemigangatho yokuqinisekisa ukhuseleko kunye nokuthembeka kweebhokisi zabo zeplastiki.