I am not an authority on lizards, however, I do know that leopard geckos are ground-dwelling, fairly secretive animals. It is no surprise that they would be content in low-height caging that is not clear as glass. I bet the skinks feel the same way.

I know of a guy who has had a Cal king in a glass tank for 22 yrs. Another fellow has a rosyboa that is 23 yrs old kept in a tank with no hide spot. With this kind of longevity, it is obvious that glass tank vs plastic bin is not a huge issue. Glass does not offgas anything harmful. Plastic (the type used in storage boxes) does when heated, likely not enough to negatively affect anything though.

I don't have many herps anymore, just my rosyboas are the mainstay. I use glass tanks for them now, and I use plastic boxes for temporary caging only. What I like is that there is no "plastic" smell with glass. No wood chips either - just inert bedding materials like soil and rocks. I'll let you know in 20 yrs how they are doing lol.
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Mark

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