1. Oring Constraints

2. Create necessary geometry changes
We want to have the Oring Constraints at specified locations
We can specify the location on an edge, we just need to create it.
Create an offset plane first

3. Create The Edge Use the Split Face tool in the modify dropdown.
Select the inner annular face as the “Faces to Split”
Click the splitting tool and select the plane.
Click OK
Hide the plane if you’d like.

4. Remove interferences Use Combine tool Select outer cup as target
Select inner cup as tool
Check Keep Tools checkbox
Click OK

5. Head to the Simulation Workspace
Put your pressure load on every interior surface that is below the split we created (I used a random number for the load).
I selected the top faces to fully constrain the model. (Using Rigid Body could work but may have trouble with mesh dependency.
Use the Automatic contacts and you are set.