As shown typically in FIGS. 4-6, the resealable stopper 40 is penetrable by a hypodermic or other type of filling needle or injection member 50 that is inserted through the resealable stopper 40 such that the tip of the needle is received within the fluid channel 38 in order to dispense a substance, such as a medicament, into the cavity 22 and thus into the packing solution and/or into contact wit