So glad someone did this research: Postal Experiments: “Molar tooth. Mailed in clear plastic box. Made a nice rattling sound. Repackaged in padded mailer by unknown individual; the postage and address had been transferred to the outside of the new packaging. A handwritten note in a woman’s writing inside read, ‘Please be advised that human remains may not be transported through the mail, but we assumed this to be of sentimental value, and made an exception in your case.’ Days to delivery, 14.”