a handgrip formed in a wall of a plastics container , the wall having an interior , an interior surface , an exterior surface and a wall thickness and suitable for containing a carbonated beverage , including an integral structure formed of a central dome having a convex surface facing toward the adjacent said exterior surface and at least two concentric annular troughs , each having an annular concave surface facing the adjacent said exterior surface , an outer frustum interconnected with each trough and connecting rings , each of curved cross - section having an annular concave surface facing toward the interior , to join , integrally , the frustums to the next outer trough and the outermost frustum to the container wall surrounding the handgrip , the handgrip having a thickness approximately equal to the wall thickness , wherein the handgrip does not extend radially outwardly of the wall . an associated container , blow mold and method are also included .