Simulated water seems pretty impressive but since it follows very strict rules of physics, computers are quite good in calculating its movement and reflections.
You could make awesome college party flyer with it:
Or simulate how rocks influence the typography of the surrounding area which I used in a paper two years ago.
I created them both with blender, an awesome 3D software. If you want to do something like that for yourself get started with this tutorial where you can model your first virtual cup.
For the next step i recommend to binge watch blender guru tutorials, which is actually quite relaxing and listen to:
- blender guru https://www.youtube.com/watch?v=YgwKPP2ZEjI&ab_channel=BlenderGuru
- the brain for blender project http://brainder.org/publications/brain-for-blender/
- thanks to RenderStreet for free rendering