I was always told as a kid that you could send anything--ANYTHING--through the mail as long as you had sufficient postage. Is it true? Well, kind of. The folks at Improbable Research made an experiment of it.
Having long been genuine admirers of the United States Postal Service (USPS), which gives amazingly reliable service especially compared with many other countries, our team of investigators decided to test the delivery limits of this immense system. We knew that an item, say, a saucepan, normally would be in a package because of USPS concerns of entanglement in their automated machinery. But what if the item were not wrapped? How patient are postal employees? How honest? How sentimental? In short, how eccentric a behavior on the part of the sender would still result in successful mail delivery?
Ski. A large amount of postage was affixed to a card that was attached to the ski. The ski was slipped into a bin of postage that was being loaded into a truck behind a station (a collaborating staff member created a verbal disturbance up the street to momentarily distract postal workers' attention). Notice of postage due received, 11 days. Upon pickup at the station, the clerk and supervisor consulted a book of postage regulations together for 2 minutes and 40 seconds before deciding on additional postage fee to assess. Clerk asked if mailing specialist knew how this had been mailed; our recipient said she did not know. Clerk also noted that mail must be wrapped.Never-opened small bottle of spring water. We observed the street corner box surreptitiously the following day upon mail collection. After puzzling briefly over this item, the postal carrier removed the mailing label and drank the contents of the bottle over the course of a few blocks as he worked his route.Deer tibia. Our mailing specialist received many strange looks from both postal clerks and members of the public in line when he picked it up at the station, 9 days. The clerk put on rubber gloves before handling the bone, inquired if our researcher were a "cultist," and commented that mail must be wrapped.