Bottom for 20oz cola bottle

This bottom, or really it's a top, was made for a 20oz coke bottle that screws into the Perch with Birdbath @BiggBadaBoom (or any of the birdbath perches in the collection of accessories (https://makerworld.com/en/models/728894-bird-buddy-accessories) After cutting the bottle down to a short size, this piece jams down onto the bottle with the bottle wall squeezed between the two walls. I used no glue, and it works great in the intended position. It's watertight enough to fill and then turn over to screw into the perch. I will update the model if I run into any issues with it in use.