I had a plated lizard killed in a reptarium, although that was before they had the plastic liner bottoms, which help somewhat. My uros are in a plastic tub with a wire top. It doesn't heat up as hot as a glass tank would, although it does get about ten degrees hotter than the outside, so I keep a thermometer in it and if it starts to approach 100 I move them in the shade, since the humidity is high here and I'm not sure how much that might contribute to them overheating. I've only once seen one of the females with her mouth open briefly as if she was hot. I have some beardies outside in large cages with wooden bottems and strong metal small mesh screen sides. -Lucy