Hello Finema,

you have to create a nearly undevelopt base surface for the flow. Your bottleneck is nearly a cone. Have a look to the picture. To create it, you have to use sweep to get the right surface structure (UV). Green is the profile blue are the rails. Then use flow. Dependend on what you want (position overlapping), you have to place the label. the length of the rails depends on the length of the circles.



Have a nice day
Karsten