Splash study.
Something is very wrong with the smoothing groups. And two solutions about it.
1- place smooth modifier with a single smoothing group on top of the mesh
2 - increase tesalation
it looks strange. on bottle has a motion blur, but for liquids there is no motion blur.
Don’t use turbosmooth, it will never look good on meshes consisting of triangles. Use HSDS modifier instead.
Hi Mikinik, I did mesh in realflow, and had some problem with motion blur, when turn on (motion blur) the “object”, corona loops in “parsing the scene”, so I just test MB in the bottle. I will make another tests to see if it’s a bug or not. Thanks!
Hi Romullus, I didn’t pay attention in this particular modifier (HSDS), i’ll study it a litlle! Usually I resolve in smoothing group. Many thanks for the tip.
I did the mesh again, here are some new images. 
This is currently a (impassable?) limitation. Motion blur cannot be applied to mesh with changing topology (changing number of vertices etc):
https://coronarenderer.freshdesk.com/support/solutions/articles/5000516180
The fluid in first picture looks most realistic to me. It looks “alive” like water. The other fluids look more sticky, dense. I guess you could play a bit with modifiers on that mesh. Maybe relax + some wavy displacement?
About motion blur. If it is for anmation perpouses then it easy could be aded in AE as post effect. Bay be tnot so very physicaly correct but it will do it,s work.