These lids are designed for the vertical hydroponic tower net pots found here https://www.printables.com/model/720081-modular-hydroponic-tower
These are representative of most light blocking lids which come with hydroponic net pots. The key difference is the break-away design.
**Update Jun 24, 2025: Added second version with thinner base (0.2mm vs 0.4mm - tabs are easier to bend) and slightly taller walls on the perimeter (7mm vs 5mm).
The author marked this model as their own original creation.