What do you believe is the best way to make a procedural texture like the one on the photo? I mean the top part. I tried to combine noise and voronoi/musgrave, but it didn`t give the desired amount of tiny bumps and air pockets.
Start with a Bezier Circle (Add/Curve) Tab into Edit mode and from the Specials menu w Subdivide the circle twice. Deselect all the control points a then select every other one by holding down shift.
Move the selected control points up (g and then z to constrain to Z axis) then from the Top view NUMPAD 7 r to rotate.
Tab out of Edit mode and add another Bezier Circle and name it "Bevel Profile".