Radiatori (obviously, 'radiators') are one of the newest shapes. They have been traced back to between the world wars, rendering the tale that they were created in the 1960s by an industrial designer apocryphal. They are modelled on old industrial heating fixtures (a straight pipe with concentric, parallel fins): in both cases these features are designed to maximise the surface area - in one case for heat exchange, in the other for absorbing flavour and trapping sauce.