I decided to make such a strange design. 3D printing time is quite long.
I wanted to make it in vase mode and print each part separately. But in my design the three small phalanges are nested in descending order within each other. Otherwise, when folding the cone, the small part may fall through and get stuck.
I printed the upper part without filling, it is attached to the cone using the bayonet method, although you can simply glue it.
https://www.printables.com/model/951462-collapsible-ice-cream-cone
Available to my active subscribers (without watermarks):
/3dmodels/Stuff/Collapsible Ice Cream Cone