Just working on my jar to reflect my website. I thought it was glass, but it appears to be a 20" x 10" acrylic cylinder. I have new ideas for internal lighting, but right now I just want to see how comfortable a thumbnail would be inside it. So far my imi varadero is happy and still exploring. I'm debating how two would feel in there, but I'd rather not have to deal with breeding since this is for displaying individuals.