Each greeting card comes with a nice white envelope and very simply includes "Printed by CafePress.com" on the back. To date I have chosen not to include any markings on the inside, so all are blank. When ordering, I'll recommend you opt for the glossy surface. It's not too glossy, though I can't speak to the matte finish since I haven't ordered any of those yet.
I ordered a variety of cards at once and all nine of the greeting cards came in a nice plastic case that can be reused with your other stationary and store-bought cards. You can see in the image below that the note cards came in their own separate case, which is nice since my plan is to give these as a gift.
You can't beat the print on demand market if you can wait a week to stock up on some very unique greeting cards.
Watch my CafePress gallery shop for more items in the coming weeks. I'm experimenting with t-shirts as I perfect my skill of making transparent backgrounds with Photoshop using my original images.