You can find this fine little throwback in a bathroom in my parents' house:
It has an expiration date of June 1998, which means it remained fresh well after K&B itself expired. It predates our family moving into the house, which means either we brought it with us from the old house, or the previous occupant of the house left it there. Either way, it's far too old to throw away now. I guess that's the sentiment.
We used to have a jar of grape jelly like that.