Kuti mugwiritse ntchito chisa cha uchi muyenera kudzaza madzi, mukachiwonjeza ndikuyika mbale, utsi kudzera pakamwa, utsiwo umasefedwa ndi madzi.
Iyi ili ndi zigawo ziwiri za zisa zokhala ndi zokhwasula ziwiri, ndipo dome ilinso ndi kusefera
Kukhazikitsidwa mu 2008, mpaka pano, takhala ndi zaka 12.Zogulitsa zathu zonse zimapangidwa ndi manja ndi galasi la borosilicate ndi galasi la quartz 100%.