The Alam and its significance
During the time of the Moharram Majalises, usually on the 8th, it has become a sort of custom to recite the events leading to the martyrdom of Hazrat Abbas. And when the Alams (replica of the Banner or Standard of the Holy Prophet and the Holy Imams) are taken out, accompanied to the beating of breasts and heads by the mourners, one will notice a Mashk (a leather water-bag), usually made of metal in remembrance of Hazrat Abbas, who sacrificed his life trying to get water for the children of Imam Hussain, who were dying of thirst.
When Hazrat Abbas rolled down from his horse after a mortal blow on his head, the Alam and the Mashk stayed linked together and never got separated. Hence one sees an Alam with a Maslik attached to it, and sometimes one also sees an arrow alongside it.