Rea u amohela lethathamong la rona le monate la maqhama a mamati a entsoeng ka lisebelisoa tsa boleng bo holimo tsa zinc alloy.Lisebelisoa tsena tsa menyako ha li sebetse feela empa li boetse li hlahisa moea oa mabothobotho le botle, ho etsa hore e be tlatsetso e phethahetseng ho leha e le efe ea hare.