Help me please
You can use the lathe tool as well.
- Create the glass
- Duplicate glass object. Delete all outer points but keep those of inner glass surface and add one point for liquid top.
This way, you can stay super flexible till you are really happy with your glass shape. As liquid is done in seconds, a change or variation is super easy.
In my example, the surface of my liquid was flipped, visible as different color. If so, go to material and choose “inverse culling”.