Leo Burnett's ice cream cone

A bit of fun from the Leo Burnett agency (now part of the French company Publicis) to celebrate, in 1976, nothing in particular.  Closed it's 9 by 5.5 inches but it folds out to 90 inches long and made up with four sections glued together and a slightly stiffer paper for the top and bottom.  I thought it was good enough to get a designer or artist credit but there
are none.