While living in central Pennsylvania, I had a roommate whose secretary made him a lemon meringue pie at Christmas. He brought it home and cut himself a slice as we played video games on his Amiga. (Did I mention this was in the '80s?)
He took one bite, made a face and put the plate on top of the monitor.
A few days later I noticed the plate was still on top of the monitor, and remarked the pie hadn't changed in the slightest. He was something of a pig, my roommate, so dirty dishes weren't a surprise—but this was different. For weeks he refused to move the plate; the pie remained unchanged. Now it became a challenge. It was Us vs. the Pie.
We were in that apartment for another year, and the whole time the slice of lemon meringue pie with a single bite in it remained on the plate on top of the computer monitor. We played dozens of games over that time without ever disturbing the pie, and still it looked exactly like it did the day he placed it there. Friends would come in the room and remark, "Is that the same—"
"Uh-huh," we would respond.
The pie finally got tossed the day we moved out. At best, the meringue may have shrunk a little, but otherwise it showed no sign of decay after a year in the open.