Tais cov yeeb yaj kiab zaj duab xis hais txog ib hom khoom ntim khoom tsim los tsim cov khoom siv Airtight ntawm cov tais muaj cov khoom noj. Zaj duab xis feem ntau yog tsim los ntawm cov ntaub ntawv xws li polyethylene, polypropylene, lossis lwm cov khoom siv hloov tau yooj yim uas muaj cov txheej txheem thaiv zoo heev uas muaj cov txheej txheem thaiv zoo heev. Nws ua raws li cov txheej tiv thaiv, tiv thaiv cov zaub mov los ntawm kev nkag mus rau sab nraud tsis huv thaum ua kom nws tshiab thiab tsis tuaj yeem.