1. Kulungele kakhulu ukugcina ukudla okulula, amantongomane, okusanhlamvu, njll. 2. Yenziwe ngepulasitiki eqinile, isitsha esikhanyayo senza kube lula ukubona okuqukethwe 3. I-airtight enamandla, gcina ukudla kukusha futhi kulula ukukuhlanza 4. Ukukhetha okuphelele kwemikhiqizo yokugcina ikhishi edayiswayo