We weren’t allowed to bring any foodstuffs from New Zealand to England so there’s nothing ridiculously old, but I did recently clear out the spices drawer and threw out some stuff that was five years old and had definitely lost its pizzazz. 
I’ve got some red pepper flakes that I bought as an undergrad in 1991. But there essentially decorative now, nice green glass bottle…
Actual food that I might eat, that would be some escabeche I made in 2008.
It would have to be a sealed mason jar of pear preserves my grandmother put up. I keep it for sentimental reasons, if I ever eat it it’ll be the last thing I eat that she prepared for me. It would be about ten years old.
I have some spices that are probably from around 2005 or 2006.
On a slightly related note, the garage in the house I had been renting had a bunch of old-timey stuff. One of the things sitting along the wall was a really old tin of lighter fluid, marked 39 cents or something, right on the label like they used to do. I needed something flammable, and by golly, the stuff was still good! The thing had to be from the 50’s.
There’s such a thing as beer that’s not drinkable?
Another sentimental saver.
I thought you were going to say, “If I ever eat it, it’ll be the last thing I ever eat!” 
I have a cake in the shape of a cradle (entirely made of icing/frosting) that lives in a cupboard. It was given to me when I was born, in 1986. I snatched a tiny bit off it recently and it still tastes fine. I’m not entirely sure why it hasn’t gone off.
A sugar cookie mix one of my kids gave me for Christmas is about ten years old. It came with a cookie cutter in the shape of the Space Needle. If I ever get a rolling pin, I might fix these cookies.
Why do they call it a rolling “pin” anyway? There’s nothing pin-like about it.
I went to a convention in New Orleans in 1982. I bought a raffle ticket and won a nice basket. One of the items in the basket was a bottle of Tabasco sauce. Still on the shelf.
My scotch.
Yep. When my Grandpa died a few years ago we were cleaning out his fridge and found still-cold cans of beer in the back. With pull tabs. The beer? Budweiser Light. Not Bud Light - Budweiser Light. It was not drinkable, but I’m not sure how much of that had to do with age.
I do not own a rolling pin. I use a big bottle of Worcestershire sauce when I have to roll anything out.
I bet I have some spices from my mothers spice cabinet that is as old as I am. And I am 52.
I don’t use them.
Things like Tumeric.
My mother in law still has some boxes in her pantry, Jello, baking soda, spices, stuff like that, that have those purple-dye prices stamped on them. That’s pretty old. I throw them away when I come across them, have for many years, but they still keep popping up.
In my freezer I have some mulberries I picked last summer. They are on schedule to be made into a pie soon, since the next berry season is not far away.
“It might be meat…it might be cake.”
- George Carlin
There is a bottle of Certo fruit pectin (for making jams and jellies) in our cabinet that has been here since my boyfriend moved in 7 years ago. It says “For best results, use before JUN 78”.
It’s still here because it’s a cool bottle. I don’t think anybody’s planning on making jelly with it any time soon.
Oh, I have a bottle of Liquid Smoke and a bottle of sesame seed oil that have been on the refrigerator door shelf for at least 15 years. Last used in making venison jerky. I should thrown those bottles out, but I just know if I do, I’ll need that stuff the next day…also on the shelf: a bottle of vintage Tweed cologne in the original box, from my aunt, dating from…the 50’s? Still as good as ever! I use it a lot in the hot summer.
I’ve had a couple bags of MREs since 1989. I don’t know how old they are 'cause I* found them in an abandoned building out in the desert! * 
I keep em in the Jeep in case (when) it strands me in the middle of nowhere. As incentive to fix it or start walkin’!
I’ve got a 6-pack of Coke Classic in 8 oz 1994 Atlanta Olympics glass bottles.
I’ve got little bottles of spices that I suspect are from the 60’s.