Liquid in a bottle?

Hello,

I've got a quick question regarding something I've been trying to work out for quite some time. I would like to have fluid in a bottle and turn it into a particle effect when it is coming out (so there are no fluid simulations). I would like to have it very similar to the way Job Simulator handles its liquids (here is some examples:

and

around 3:43). If anyone has some source code (or shaders) or could lead me in the right direction, that would be great

Thanks and hope to hear from you guys soon,
Mike S.

 

I think I've managed to fake that with projector in my some of my old projects

 

I would suggest a mesh for the water "surface", and then simply move the mesh depending on how "full" the mug is supposed to be.
As to how to place the particle effect, it's a round opening on the mug, and you can convert that to world space, then simply place the particle system at the bottom of that?