Iyi liner inogadzirwa nealuminium foil layer uye backup layer.Inoda induction seal muchina.Mushure memushini wekupinza unopa kupisa-chisimbiso laminate hermetically yakavharwa kumuromo wemudziyo, iyo aluminium layer inonamwa pamuromo wemudziyo uye yechipiri layer (kadhibhodhi yefomu) inosiiwa muvharo.Iyo yechipiri liner sereseal liner inosara muvharo mushure mekupisa maitiro.