This is what tootsie roll has been using for a hide ever since she got stuck in the doorway to her cave...: it's a flexible piece of drain tubing from home depot. It is in a "u" shape under the coir, so she can go in one side and out the other. I actually stole the idea from Gbtortoises . I saw he had bigger drain tubes he had made burrows with in his enclosures.