I recently came into possession of something unusual. At...

 I recently came into possession of something unusual. At least I've never seen anything like it before.I note that it says "Survival Cracker" not "...Crackers" -- At 18 pounds, I'm wondering if I can get the cracker out of the can. I don't see a "best used by" date, but it was sealed in mid 1964. The contents are older than most of the people with whom I associate. I should work this object and