An object of matematical art, designed keeping in mind the typical problems of 3d printers with fdm technology, such as prusa, makerbot or ender; for this reason it is possible to print it without supports. This object is made up of 31 points in a random position in the space. These points gives life to a 3d Voronoi Diagram. The sides of this Diagram and some NURBS (Non Uniform Rational Basis-Splines) becames pipe.