The CD format is still doggedly in jewel cases and with all things, plastic could become a landfill problem, so I am always pleased when a cardboard design is used instead. The digipak is the halfway house version where the CD tray is plastic. Most of my Impulse CDs come in that format. Those on the International Anthem label tend to be in stiff cardboard option. So Jeff Parker, and Irreversible Entanglements for thinking of the environment.