A circular "pop-top" can has a multilayer foil (19) and resin (20, 21) base 4, on the upper surface of which a rigid injection molded resin layer 5 is formed. An elliptical groove 6 surrounds a semicircular pedestal 8 extended inwardly by a U-shaped projection 9 having score lines 18 extending across its legs. The butt of a pull tab 12 is fixed to the pedestal such that upon lift up the tab and pedestal pivot downwardly about the score lines to rupture the exposed base at the groove.