My guys love cardboard shipping tubes from FedEx. I'll buy one or two tubes and cut them into 12" segments with a hacksaw. They're not ideal: I have to push the snakes out, rather than simply picking the hide up off of them. And the cardboard gets dirty, so I'm constantly having to throw the tubes away. But the ball pythons LOVE them. I think the snakes feel a little more tight and secure than they do in the half-logs.