3D printing has been being used as a marketing tactic for some time now, as it certainly attracts interest of the media, and the internet in general. Hellmann's realized this and has come up with their own 3D mayonnaise printer. The printer has printed selfies of people on their hamburgers in the UK. Pretty clever marketing tactic I would say. Not really much of a practical use for this, but certainly entertaining to watch. More details, along with a video can be found here: http://3dprint.com/10525/hellmanns-3d-mayonnaise-print/

Check out one of the prints on the burger below: