A carton accommodating primary containers such as beverage cans arranged in at least three lateral rows in which the centre of said rows has fewer containers than adjacent rows. The carton comprises a pair of superposed tray structures (70) which are connected together by a wrapper (10) having a handle structure (52). The trays each have a retaining keel (94) extending inwardly of the tray for retaining the centre row of containers in an inwardly offset condition with respect to the adjacent rows of containers.