Amabhokisi okulawula aklanyelwe ukuqinisekisa ukuthi amadivayisi atholakala ngokuvikelekile futhi avikelwe ezindaweni ezinokhahlo, afanelekele ukusetshenziswa endaweni yezimboni noma okungenzeka ibe yingozi.Okuvalekile kuyatholakala ngezinhlobonhlobo zezinto, imibala nezitayela, okuhlanganisa ipulasitiki, i-aluminium nensimbi engagqwali ukuze ivumelane nezinhlelo eziningi zokusebenza.