It actually says don't store it after it's been removed from the packaging. It's probably based around corrosion concerns both to the ferrocium as well as sensitive equiptment it might be stored alongside. Some military stuff will sit for decades.

Oh, and btw it's the military.

Did yours not come with the gel coating as well? I thought it was a nice touch for all those who are worried about corrosion and actually paint it with nailpolish.

I've personally never had a big problem with corrosion, and I live in one of the more corrosive enviornments possible. But hey, what ever floats yer boat.