I know its cheaper to use tupperware, but I don't like the way it looks. I want to get a Zoo Med Repti Shelter for my single adult Leo, but I don't know what size to get. Will he fit comfortably in a Med or does he need a LRG? Also,has anyone ever used the Exo-Terra Reptile Dens as a humid hide. If so, how did you do it and what's size is good for an adult Leo?