This is a snap-on cover for AeroGarden Seed Pod→Shrouded. It helps keep the light off the root medium to reduce mold growth. It has a hole for the plant's main stem and a slot to remove it when the plant has grown big enough.
It will likely (I haven't tried it) not work on standard AeroGarden pods. It was designed to fit specifically on the Sturdy Aerogarden Seed Pods and AeroGarden Seed Pod→Shrouded.
I printed this on a Prusa MK3S+ at .20mm with 15% infill using natural (no pigment) PLA.
The author marked this model as their own original creation.