Gravity fed cat water dish

I wanted to make a self feeding water dish for our new cats that could hold a large amount of water. All the others I found on here seemed to be built for 20oz or smaller bottles. I decided to make one that could attach to a 32oz or 64oz Gatorade bottle(they have the same threads). This was not the first version but it uses about half of the plastic the original did. It requires a build area of at least 175mm x 140mm, not huge, but not for smaller printers.

Also, for best feed rate I've found that I tighten the full bottle all the way on, flip it over, then unscrew it about 1/4 turn. The bubbles flow freely then. The 32oz bottle lasted about 2 days with two cats drinking from it. So far, I've been the only one to knock the 64oz bottle one over, the cats have yet to knock either one over.

12/06/2017
Just revamped the dish to address a few things. The one ending in ver2 is the newest at this point. It has a less pronounced lip and fewer sharp crevices, both are for easi