I think they're pretty neat too! A bit more expensive than regular bins but I think they add some nice visibility without sacrificing being stackable.

There seems to to be a little inner rim at the bottom that would allow for substrate, so I'm not overly worried about that. My girl has settled down but I still would like to put her in one of these because she currently resides in the sun room (it stays a balmy 80 degrees just about all year without additional heat) and it would protect her eyes better from the light. Though I admit I did just paint the back to help with this. It doesn't look as nice though.