Hello there!
I saw that you had made this cool potion mod and I was really excited, I managed to whip this up in the last few hours, though, the textures were temporary grabs from my compilation of minecraft textures. I could send you the model if you want! I planned on making a potion fluid, but I honestly have only worked with this program as of today, and have no clue. I can even add a cork, or animations too.