A blank for forming a carton of the end loading type for containing a plurality of beverage cans, the capacity of the carton can be increased to accommodate the insertion of ice-cubes into the carton for cooling the beverage cans contained therein, the blank for forming the carton, including a series of main panels including at least one top panel, one of the top panels having a tear strip and thereby being separable into two parts, the blank further including end extension panels, wherein upon constructing the blank into the set up carton, separating the top panel, by deploying the tear strip, allows each end extension panel and each of the separated parts of the top panel to be raised above the tops of the beverage cans to increase the capacity of the carton to accommodate the insertion of ice cubes.