Sometimes you need to determine a liquid volume of a container, but the shape may make it difficult. In the tutorial, we will determine the liquid volume of an existing cup with only a single feature.
The cup model is shown below, and also in cross-section.
We start be creating a Reference Plane that will determine the top of the liquid level mark. The Plane was made as offset from the base (below).
Next, we create a Boss with the sketch plane on the new Reference Plane. Select the inner face and select Convert Entities.
When the sketch is created, select to Extrude using Up To Body and pick the model.
The trick is to un-select the Merge Result button. This will create a feature (Boss-Extrude 3) that is not attached to the actual model.
Now in Evaluate, select Mass Properties. Delete the selection called Part, and select the feature just created. The Mass Properties results will now only be for the un-merged featured. This is your liquid in the model.
You can suppress the feature and save your model.
Have fun and enjoy.