This might looks easy, but when you do it under the real scale Geometry,(moving up and down, and after that Keep it still for about 150 frames, usually, you will see the water level starts to drop ) you will notice the difference. you can try yourself if you want to. this is NOT easy!
Flip particles are not “leaking”, water volume remains unchanged through out entire Flip sim, with 1mm Collision thickness. moving collision object. real scale flip sim, didn't sim at 0,0,0 or sim at different scale. the size of this wine cap is about 0.2mX0.1m
suitable for all houdini ver with Flip solver.
if you want to have this tutorial? please contact : firstname.lastname@example.org