They say "Home made baby diapers," so there's nothing particularly mysterious or outrageous about them. If you look closely, particularly at the Luvs ones, you can see that they've just peeled the cloth-like backing off of actual Luvs diapers and fixed it to adult diapers. This is made even more obvious by the fact that the purple hatch marks, normally aligned with the crotch fold of the baby diapers, are halfway up the front of the adult diaper. No doubt the backs of these adult diapers are mostly white, which is probably why they aren't pictured.
Not a bad craft project, but probably not something I'd spend money on. If they'd actually blown up the prints to fit the adult diapers, that might be worth talking about. Otherwise, just grab your favorite adult diaper, a package of Pampers or Luvs, a glue stick, and go to town.