A packaging comprising: - a first main panel , a first side panel , a second main panel , and a second side panel , defining a box body and being separated from one another by folding lines formed on a flexible material sheet, - at least one closure cover for said box, wherein the closure cover includes a tongue projecting from a closure panel in turn projecting from the first main panel , the closure panel being separated from the tongue and from the first main panel by folding lines , - the tongue being configured to be introduced into the box under the second main panel , and wherein through the tongue at least one elongated window is provided, - a lug projecting from the closure panel and being arranged coplanar with it, - a first dust panel projecting from the first side panel and a second dust panel projecting from the second side panel , wherein each dust panel is provided for turning about a folding line and is configured to be arranged under the closure panel of the cover, and - a first tooth being arranged coplanar with the first dust panel and a second tooth being arranged coplanar with the second dust panel , and wherein the teeth are configured to extend through the window and to project from the window as said cover is closed, characterized in that - the second main panel , which is arranged opposite to the first main panel , comprises a first preset breakage line for facilitating a separation of a portion of the second main panel , and - each dust panel includes a second preset breakage line along a portion of the respective dust panel , wherein the second preset breakage line extends along the whole dust panel from a first side to an opposite second side, wherein neither the first side nor the second side are in the form of a folding line or an outer contour of the dust panel , which outer contour is parallel to the folding line between the dust panel and the respective side panel . - a first main panel , a first side panel , a second main panel , and a second side panel , defining a box body and being separated from one another by folding lines formed on a flexible material sheet, - at least one closure cover for said box, wherein the closure cover includes a tongue projecting from a closure panel in turn projecting from the first main panel , the closure panel being separated from the tongue and from the first main panel by folding lines , - the tongue being configured to be introduced into the box under the second main panel , and wherein through the tongue at least one elongated window is provided, - a lug projecting from the closure panel and being arranged coplanar with it, - a first dust panel projecting from the first side panel and a second dust panel projecting from the second side panel , wherein each dust panel is provided for turning about a folding line and is configured to be arranged under the closure panel of the cover, and - a first tooth being arranged coplanar with the first dust panel and a second tooth being arranged coplanar with the second dust panel , and wherein the teeth are configured to extend through the window and to project from the window as said cover is closed, - the second main panel , which is arranged opposite to the first main panel , comprises a first preset breakage line for facilitating a separation of a portion of the second main panel , and - each dust panel includes a second preset breakage line along a portion of the respective dust panel , wherein the second preset breakage line extends along the whole dust panel from a first side to an opposite second side, wherein neither the first side nor the second side are in the form of a folding line or an outer contour of the dust panel , which outer contour is parallel to the folding line between the dust panel and the respective side panel . <EOS>