HOW TO USE CROSS SECTION AND MORPH: Let's take Tube ,Delete its depth ,apply edit poly ,apply Generate Topology ,apply inset, apply Edit Poly with animation ,delete mesh ,Edit poly ,Apply Morpher,Then apply edit Poly with setting .Apply Morpher for Capturing state Two.Apply Volume Select.Take a Cylinder add it to Tube through Volume select.
For another design take Rectangle ,Copy and rotate ,Attach ,Apply cross section to both of rectangle.Now repeat the same action as for Tube.