I found this box at WalMart yesterday. I thought it might make a good humid hide for my RF's indoor/winter enclosure. Question is, do you use the snap-on lid on the bottom as it is a little wider and will accomodate the tortoise longer (box tapers slightly to the bottom)? Or do I set the box upside down directly on the substrate? I plan to glue a sponge on the upper portion, whether that ends up being the lid or the bottom of the box. They had a larger size too--about the same height but larger in width and depth. I liked that this one wasn't clear like most shoeboxes. Also, how small should I cut the hole in the side? Just big enough for her to get in now?