Abstract: The invention relates to a one-piece molded plastic over-cap, collar, container, or housing, of the type that preferably snaps down over or within an aerosol type spout or screws onto the spout, the over-cap differing from prior devices in that the resilient wedge projections extending about radially inwardly have upper-edge faces separate from and space away from and extending beneath the inner surface of the top horizontal inner wall of the cap device such that the molding process thereof and the resulting product from the molding process does not result in a top surface characterized by sink marks characteristic of prior art caps, the sink marks resulting from contraction of the cooling plastic of the respective wedge projections, the contracting plastic pulling downwardly on the top of the cap at the particular locations at which the radially inwardly wedge projections are in prior art caps positioned and integral with the upper wall, the present over-cap devices being free of such contraction-sink indent