I bought one of these (from elsewhere) and it arrived with the bottom in slivers. The replacement sent to me also arrived lightly cracked, but I just went with it, and as I've used it[and not even under heat!] the tiny hairline cracks have spread, -audibly-, until that was was not usable either at the fear of harming my geckos.The problems lies in the fact that these things are hollow and made of quite a cheap brittle plastic that simply does not hold up in the mail, and I'm not even sure after seeing those cracks spread how well they will hold up during normal use. They just don't seem structurally sound. The body needs to be solid and not hollow. Check the amazon reviews for the Large Hide, there are similar reviews to mine.Great idea but not worth the headache.