I have been playing with lofting using Creo. I was pretty impressed with the results. I have included the source file for the Creo modeling express version. It is a free download and has been super powerful to use and fairly easy to figure out.
The part was printed with single wall vase mode using slic3r.
Added Hollow Vase for those that don't have the Spiral Vase Feature on their printing software.
Added HD Version for kloppertje