Most of the objects on that pinterest page are ceramics http://www.shapeways.com/materials/ceramics http://www.shapeways.com/materials/ceramics And sugar isn't

Most of the objects on that pinterest page are ceramics http://www.shapeways.com/materials/ceramics http://www.shapeways.com/materials/ceramics And sugar isn't being used for extrusion, unless you're referring to the paste extruders which are basically icing bags.