Hi Biscuit, Criterion Editions are not Digibooks, and there have been no Steelbooks made of Criterion films. There are Blu-Rays and DVD's, but they used to come in regular clear plastic cases, and also in a digi-pack kind of case. In this forum area, we are focusing on the BD Criterion Eds. Some info.
I had about 75 at one point, when I was trying to collect all of the blu's. I then started clearing out some of the one I didn't enjoy enough to watch a second time, and lost my, I need them all fever. I still have about 55 at this point, not including the ones I'm looking to get rid of.