Already made

Rob Myers, Urinal, 3D file

Like Duchamp Myers has enabled an art work to exist by an idea alone. In keeping with Duchamp's iconic Fountain (1917) the artist (Myers) has removed his hand from the work - albeit by employing another to create a potential object to exist, rather than appropriating an existing object and nominating it as art.

Myers Urinal was created by Chris Webber a software engineer who generated the model as three dimensional image so that the digital file could be physically rendered by a 3D printer. The file has been made available by the artist for anyone to download, print and sign (see thingverse download page). Alternatively (if you don't happen to have a 3D printer to hand) Myers 3D printed Urinal is also available to purchase through shapeways. Although technically Duchamp did not completely remove the Urinal's possible function I do believe Myers Urinal to be purely ornament.