This is a custom designed dog poop bag holder that also has a lid for holding training treats. There is also an included basic lid that does not have the treat stash. The treat lid snaps together from two pieces, and then both lid types just snap onto the base.
This was printed on both the fast and normal presets in cura. To print the treat lid, supports are needed, and a brim is preferred as this will prevent the lid from breaking free from the build plate.