sounds like you'd best hang on to some of those for times that you really need them. Nematocyst
From the sounds of things I'm going to need them right away if I can get out and shoot the Shamrock Shoot. Something I plan to do asap.
I don't really expect these to have the same magic, they are boxed differently but should be from about the same time of mfg. I think they would be about four or five years old.
DJR