I had multiple cartons on hand for several months after I quit smoking. It wasn't really that I wanted to keep them "just in case", I just had so many that it took a while to get rid of them. I sold several cartons dirt cheap, gave several more away ... by this time I was thinking they'd probably be getting stale. I threw 3 or 4 cartons (not sure) in the garbage. And that was that. The story ended sometime around April of 2010.