Closure cap

In a closure cap having a connecting portion and a distal end wall defining a dispenser port, and a stopper tab having a finger-manipulating portion, a stopper portion arranged to be fitted removably in said port for selectively closing said port, and a pivot portion pivotally mounted to said end wall, the improvement comprising:

• a concave portion of said end wall defining a camming surface;
• and
• a resilient finger on said stopper tab having a tip portion slidably engaging said camming surface, said camming surface defining means for causing said finger tip to be deflected by its engagement with said camming surface when said stopper tab is arranged with said stopper portion received in said port so as to bias the stopper tab toward the axis of said pivot portion, said camming surface further defining means for causing said finger tip to bias the stopper tab pivotally toward an open position wherein the stopper portion is spaced from said port as a result of said stopper tab being moved from the port-closing disposition, and said camming surface further defining retaining means for causing the stopper tab to be releasably retained in a fully open pivotal position.