I have my female Russian in a plastic under-the-bed storage bin (obviously its not under the bed now that shes in it. And she is constantly trying to climb the sides. The container is that white-seethroughish material that storage bins are sometimes made of. I understand they don't understand see through material so I covered the sides with duct tape and the sides are now opaque. She is always trying to climb the sides, I just want to know if this is okay or if it is stressing her out.