Jewel case meaning a hard plastic case, where you can have something imprinted on it:
The booklet would go underneath, so there would be an image "floating" over the booklet.
I don't know what they did for the digipak, if there is one:
Theres a pic of the cover of the digipack and a pic of the digipack opened up as well. The equal sign is on the horizon image on the cover.