From this project's README

USAGE
Load the model you want to use. Open the folder that corresponds to the model version (Genesis 8 Female, Genesis 8 Male, or Genesis 9). Decide which hand you want your model to hold the glass in, and select the appropriate Smart Prop.


POSE CONTROLL
If your model's hand position is no longer correct after assigning a different pose, first use the "_Reset" preset for that hand, and then reassign the "Grasp" pose.


MATERIALS
To assign a material or preset, select the glass in the viewport. In addition to the two basic variants (BASE), you can also customize the glass (3 variants) and the liquid (6 variants) to suit your preferences. The extra glass material called "High Refraction" can be used for experimental scenes.

If you want the glass to be empty, use the preset "Liquid Visibility None"


PRESETS
Presets are assigned just like materials: select the glass in the viewport and assign the desired preset.


STAND ALONE
This glass object is not linked to a model and can be positioned freely. All materials and presets work with this glass object as well. It is placed in the center of the floor between the model's feet.






Enjoy
Base picture without post proc