I got home from work today and found this can on my front porch:
I brought it in and tried to clean it up. Here it is after I messed around with it:
Not much better. It's an extruded steel can with a tab top. The can dates back to 1982-1987, those were the "Pepsi Free" years before the "Free" was dropped. Since 1987 it's just been known as "Caffeine Free Pepsi."
There are a few people I think it could have come from, but until I find out for sure I'm going to assume it was the Can Fairy. You're never too old to believe in the Can Fairy, right?