I don't think a cardboard display will hold much honey, especially in glass.
The graphics idea is great though.
I would try to find a carpenter buddy to build a display out of plywood. Find out how big of a footprint the store will allow you to have and design from there. A back lite display will brighten up the honey fora more appealing product (if there is power at the display site).
Good luck with it and let us know what you come up with.