Iingqimba ezininzi zezinto ezinokutya, kubandakanya iiphaneli ze-vacuum, intsimbi engenasigaba, kunye ne-aluminium, yenza oku krwada. Ngokunciphisa umdlelo wobushushu, umaleko we-vacuum uqinisekisa ukugcinwa okusebenzayo kwaye ukuthoba ukubakho kwe-CO2 ngaphambi kwexesha ukutshintsha kube yindawo yegesi.