Next Challenge Making funnels

Something I have been known to do on these printers is make a funnel which is basically just an inverted cone. It is possible to make a circular shape sideways because a circle support zone structure all the way until it is closed on the top similar to an arch. it would be helpful if i couldIt would be helpful if I could attach *. STL files to these posts, as far as i can tell there is no way to as far as I can tell there is no way to do this yet.