Container cap

A cap for fitment to a closure neck of a container, such as a beer keg to cover the dispensing valve therein, said cap including a generally flat cover portion having a generally circular periphery, and an annular skirt portion depending from said circular periphery of said cover portion, said skirt portion including snap-fit means for fitting the cap to the closure neck, said cap further including at least one continuous line of weakness extending completely across said cover portion and substantially through at least one side of said annular skirt portion, with said at least one line of weakness including (a) a first portion which extends linearly along a diameter of the circular periphery of said cover portion and along at least a major portion of the length of such diameter, and (b) a second portion, and a depressible tab portion formed in said cover portion, with said tap portion having an edge which is defined at least in part by said second portion of said at least one line of weakness and being depressible in a direction perpendicular to said cover portion, such that upon downward depression of said tap portion the cap is at least partially separated along said line of weakness to allow detachment of the cap from the closure neck.