I think it's a good idea and not a bad question at all :thumbup:
but like stated, they do dry out over time, use them up when you can and replace them,
test one every now and then to find out.
another fast food thing that some have talked about here is the "honey" packs you get there,
great for an energy blast and they store nice in b.o.b.s and packs too, also put them in a separate
zip-lock bag to protect other things and keep them lasting longer.