Shelves for Life, a self-initiated project by designer William Warren in 2006, are CNC cut in oak veneered plywood to the customer's measurements. They are intended to be used throughout life as storage for personal belongings (I am talking about books in this case.). On death, the shelves are dismantled and rebuilt as a coffin. How sweet!
You know what? This project is currently (or finally) in production. I will be very "muchy" happy to receive such a wonderful gift in the near future. By the way, I am 165cm tall, medium build.