stop disk 950 with sufficient pressure to collapse flexible region 960 into base 930 until flexible region 960 inverts piercing tip 970 descents sufficiently to pierce the liquid reservoir and activation disk 940 comes into contact with stop disk 950 another preferred embodiment of the invention is shown in fig1 and fig1 a dispensing cap 1000 shown generally in fig1 is configured to work with a fluid or gel reservoir 1100 shown generally in fig1 the engagement between cap 1000 and fluid reservoir 1100 is accomplished via the use of a raised structure 1150 and a pre activation ridge 1101 of a head region 1115 of fluid reservoir 1100 and a locking groove 1073 and a pair of slanted cam followers 1071 about an internal wall 1051 of dome 1050 thereof these are shown as but are not limited to being 180 u00b0 apart and unitary with dispensing cap 1000 as shown in fig1 internal wall 1051 of dome 1050 of dispensing cap 1000 extends perpendicularly from an edge 1053 of dome 1050 to approximately halfway up dome 1050 where a smaller inside diameter of dome defines an internal ledge 1055 and an internal wall 1057 the lower junction of internal wall 1057 is shaped into locking groove 1073 two regions of internal wall 1051 of dome 1050 of dispensing cap 1000 are raised to form slanted cam followers 1071 slanted cam followers 1071 are generally positioned in the region between edge 1053 of dome.