I think you'll find the NZ J Amenity Kits have changed and you'll be able to confirm this but I believe that when you flew a few years ago the J Kit was in a box. Now it is a little envelope type thing with no fancy eye mask (Or at least when I flew in April to LAX in J that was the case
New Amenity Kit ->
http://boardingarea.wpengine.netdna-...enity-kit2.jpg
Old Amenity Kit ->
http://www.airreview.com/AirNZ/AirNZ-Amenity.jpg