What you can do is get a tupperware that will fit your snake inside, cut out a hole big enough for it to crawl inside and melt the edges of the hole so they aren't rough. Then buy some organic moss from either a pet store or a gardening store, wet it so that it's damp, but when you sqeeze it no water comes out. Put that inside the box and whamo! You've got a humid hideJust replace the moss every now and then so it doesn't get dingy. I'd suggest putting the humid hide on the warm side of the enclosure.