The mesh lid on my 10 gallon terrarium was too ventilated and rusted from keeping it in high humidity. This has far fewer holes (while keeping some for ventilation) and I printed it from ABS and PETG (ABS warped far less than my PETG half). I used Prusaslicer to split the part in half to fit on my 230x230mm printer.
V2 includes a thinner profile, centered pull bump, and a simple access port. V3 is planned to make the access hatch hinged and more reliable against critters pushing it up.
Note the access hatch cover needs some supports because of the flush cutout. I'm hoping to improve on that in V3.
The author marked this model as their own original creation.