We have a commercial dog waterer, but it holds a large amount "static" of water in two large lower sections. That get stale and dirty--especially when the cat plays in it all the time.
This design minimizes the amount of water that is not in the bottle.
This thing is big.
It takes a huge amount of time and plastic to print. I am pretty sure it is not an economical project.
It should probably be redesigned to be a "shell".
After gluing all the build sections together using ABS plumbing cement, I shaved and sanded it, then painted it with the same ABS cement. This closed all the pores and gave it a slick appearance.