I gave away a windjammer last Thursday and when I got it off the shelf and tipped it over, out fell a dented and corroded 12 gauge shotgun shell, a single sunglass lens, WD 40 straw, a cigarette butt and a plastic tube that looks like what folks in movies use to snort coke. (I don't get around much)
Previous best was a nice pair of round lens green sunglasses like the Beatles used to wear, and a 50 cent piece. I wore the glasses while riding once and caught old hippie chicks checking me out.
A set of Vetter saddlebags I got once, held duct tape, twine, and a rusty butcher knife.
After hearing that Vetter would occasionally put a stash box inside the hand laid fiberglass fairings I have always checked inside. All the above is true. Mostly.