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We will begin by using a quick water preset. 

Create a polygonal sphere with a Radius of about 4.0 centimeters. This sphere will be the source of the liquid.

With the sphere selected, click on the Tap Water Preset button from the  Phoenix Shelf.

Let the simulation for a few seconds and you will have a chance to see the results in the viewport, click the Stop button to end the simulation process.

Now let’s make the liquid collide with and fill an actual object rather than just the Simulator’s grid. 

The following scene file can be downloaded from the Overview section above. It consists of a jar with a studio lighting setup and background.

Switch your view to camera1 see what will be rendered.

Return to the Perspective view and select the sphere. In the Phoenix Shelf click the Tap Water Preset like we did before.

We will need to adjust the Simulator Grid Size so that it covers both the sphere and the jar. Again, use the X/Y/Z Size parameters in the Grid rollout.

Start the simulation. Once it is finished, go back to the camera view. Here is how the simulation looks so far.

Next, we will create materials for the water and the glass jar.

Open the Hypershade and create a new V-Ray Material.

Set the Diffuse color to RGB [ 0, 0, 0 ].

Set the Reflect and Refract colors to RGB [ 255, 255, 255 ].

Set the Fresnel IOR to 1.33.

Enable the Affect Shadows.

Assign this material to the Simulator.

Create another V-Ray Material for the glass jar.

Set the Diffuse color to RGB [ 0, 0, 0 ].

Set the Reflect and Refract colors to RGB [ 255, 255, 255 ].

Set the Fresnel IOR to 1.6.

Enable the Affect Shadows.

Select the glass part of the jar and assign this material.

Render a frame to see how the fluid is interacting with the jar. Any geometry inside a simulation container will automatically interact with the emitting fluid. In addition, geometry can be excluded from interactions, and you can even create Non-Solid geometries, which are geometries that a simulation can flow through, but still be used as sources or forces acting on the simulation. You can find more about this topic in our Solid and Non-Solid Bodies QuickStart tutorial.

With the current simulation the fluid will eventually overflow the jar. To control how much fluid is discharged by the emitter, select the Liquid Source object and locate the Discharge parameter. Animating this value will control how much liquid is created, which can be used to start and stop the pouring of water. 

Before proceeding, let's set the Grid Size of the Simulator.

Select the Simulator and navigate to the Grid rollout.

Set the Scene Scale to 2.685.

The Cell Size to 0.395.

Size ( X, Y, Z ) to ( 94, 185, 94 ).

After the simulation finishes you may notice that the result appears a little choppy if you scrub through the Timeline. To fix this, select the Simulator, go to the Preview rollout and turn off Show Mesh. Only particles for the liquid pour will be displayed and the simulation will scrub faster. At any point in the simulation you can turn Show Mesh back on to see the liquid better.

Notice that the fluid makes some drops that hit the in-sides of the Simulator walls. This can be fixed by making the liquid less spread out, as it falls into the jar. Also, take note of how the water is making contact with the top of the volume. We can fix that by moving the sphere down slightly to create a little more distance between it and the volume.

First, select the Simulator and in the Grid section, under Container Walls, make sure the X/Y/Z walls are set to Open.

This will keep any of those droplets from colliding with the Simulator.

Now let’s fix the spreading of the liquid as the emitter stops discharging. Select the Liquid Source object and change the Emit Mode to Volume Brush. What this means is that instead of emitting the liquid from the surface area of the sphere, it will now emit from the whole volume of the sphere.

A window will ask to convert the emitter to a Non-Solid object. Select Yes. This will prevent the sphere geometry from interacting with the liquid simulation.

Finally, select the Simulator and under the Dynamics rollout reduce Steps Per Frame to 5

Start the simulation and you can see that the liquid is coming from the volume of the sphere now, as opposed to just from its outside surface.

Stop the simulation when the jar is halfway filled up and scrub back and forth to see the pour nicely contained even after the Discharge value turns off at frame 23.