I just got one of these:
Zoo Med Naturalistic Terrarium 12x12x18 inches (30x30x45 cm) from Petsmart for $44.99 + sales tax (limited time special offer). Pretty stonking deal. Going to put thumbnail dart frogs in it. I'm going to fruit fly proof the front vent and doors, and put a glass panel and a vent on the top instead of the included mesh screen. Exo Terra makes a similar product with a trickier door catch and double doors, but I avoid those because the one I bought leaked and the door frame wasn't even. Now it's Zoo Med's turn.
If all goes well, it'll be a superior version of my 10 gallon aquarium conversions, because of the removable lid and dual venting (in the base of the door and in the ceiling). A lot less silicone and time involved, plus the glass is better quality than aquariums.
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