FACT: The black polypropylene products purported to be coffins are grave liners, or burial vaults, manufactured by Convington, Ga.-based Vantage Products. (In this case, they are examples of the company's Standard Air Seal model.) The use of a burial vault, which prevents the collapse of cemetery ground and protects the casket, is a common requirement when a body is interred.
The filmed lot in Madison, Ga., is a Vantage storage facility. Of the 900,000 or so in-ground burials in the U.S. each year, a small percentage of those people prearranged their own caskets and vaults—which Vanguard holds at the storage facility until the appropriate time. According to company Vice President of Operations Michael Lacey, there are approximately 50,000 vaults in storage in Madison. "It's nowhere near the quantity they talk about on the Internet," he told the local Morgan County Citizen newspaper. Furthermore, Lacey has said the company maintains detailed records of product ownership and is audited annually, to insure all vaults are accounted for.