Yep, and it worked out because I could then stack all my cages so it wouldn't look weird - at first I only got one for my adult RTB but I liked them so much that I got more so it wouldn't look out of place!
I usually put that little bit of aspen down because I have a hard time keeping humidity up and I'm playing around with things to keep it up, I think there is some sort of moss I can use though and once I figure it out that will probably replace the aspen.. I used to have only aspen in those cages but the snakes just move it all around and then its almost pointless to have it in there because they just lay directly on the cage, and its a pain to get out!