The orignial had the bowl to close to my face and the shape was odd. The stem I made prints fast and uses very little material, just be sure to give it a decent brim for surface adhesion.

I uploaded 2 bong models, the no support design mimics the original and has less airflow to the mouthpiece so it doesn't clear the bottle well. If you dont mind adding a small support in the bottom I suggest the other one.

Last I also created and included an adapter so you can fit it to any of those cheaper style water bottles that are everywhere, and cheaper than a 20oz pop. Hotels usually give you one free at check-in.