I am making funnels for a friend and he requested some interesting design what he asked is that the sides be convex (kind of bubbled up) yet keep the edges as curving inward. I have attached pictures of what I have wants to achieve. He used a lighter to heat up the plastic and try to melt it to shape to show me what he hants here is the picture. I am using PTC creo there is a surface editing tool which I can pull the surface up to a convex form but I cant keep the edges as they are. I am willing to use another cad software if it will help achieve this design.

Hello Lion-Sage and John, eventually see this if OK on your PTC Creo as it would be done on AutoCAD.