fig2 4 is coupled such that the dispensing cylinder 13 extends into the interior volume of the beaker 2 the dispensing cylinder 13 is filled with a solid or granular activator not illustrated that is manually dispensed into the beaker 2 at the appropriate time and temperature fig2 3 are side views illustrating one embodiment of a dispensing cylinder 13 coupled to a beaker 2 specifically fig2 illustrates the dispensing cylinder 13 with a check valve 14 in the u201c closed u201d position while fig3 illustrates the dispensing cylinder 13 with the check valve 14 in the u201c open u201d position the dispensing cylinder 13 comprises a cylinder body 25 and a removable plug 19 a first end of the cylinder body 25 is disposed through the lid 5 of the beaker 2 and is sealed from the interior volume of the beaker 2 by the check valve 14 an opposite second end of the cylinder body 25 is sealed by the removable plug 19 the check valve 14 comprises a piston 15 that is coupled to a first rod 18 a biasing element 17 such as a spring biases the first rod 18 in a direction away from the beaker 2 i e away from the first end of the cylinder body 25 a first seal member 26 such as an o ring seals the check valve 14 from the interior volume of the beaker 2 the removable plug 19 comprises a second rod 21 coupled to a knob 23 the second rod 21 is coupled to the knob 23 by a second seal member 22 such as an o ring a third seal member 20 such as an o ring seals the removable.