A little base for a dwarf hamster I made for a friend. has little things for the hamster to grab on to to get out. if you are worried about air then you can have the holes barely stick out. If you don't want the holes, then take off the lid, flip in over, and screw it on the other way.
(if someone has transparent filament please try it out for me and post it)
The author marked this model as their own original creation.