designed to coact with the finger grip depressions of the haller closure it is understood that the dimensions and shape of the lug could vary in any manner as would be suitable for coaction with indentations or other appropriate surface irregularity on the side wall of a tip portion of any twist open dispensing closure in addition to this it should be noted that it is possible to construct a latching member which has two diametrically opposed lugs instead of the single lug described in the preferred embodiment without departing from the spirit of the subject invention the material to be used in constructing the fitment 100 should have stiffness and resiliency or springback characteristics which permit the lug 152 to properly engage and disengage from the fingertip depressions of the tip member 16 without damage in this regard polymers having high flexural strength as measured by astm d 790 will fulfill this requirement for resiliency in addition the material should be hard in order to physically interact with other components without damage another consideration is that the material should be inexpensive in order to lower unit production costs lexan a polycarbonate bisphenol a polycarbonate manufactured by the general electric co plastics div 1 plastics ave pittsfield mass 01201 and the preferred material more than adequately fulfills the above.