How to model a twisted cylinder like this I'm new to modeling. I want to make a cylinder-shape object as follow. I'm thinking of it as a twisted cylinder. 



I tried using twist modifier on a cylinder but the result was disapointing.



How should I make them? I'm using Blender 2.8
I would use the Screw modifier for both examples, assigned to simple profile meshes.



Because the longitudinal connections are staggered, this method avoids the creation of twisted, non-planar faces.