This one is a little bit outside of what I normally make. Challenge 16 is King PolyPouches by Chris Palmer. He has his own website and a book that show some of his work. He typically uses inscribed geometries to bend paper into different neat objects. This can require thicker paper (which is why I shy away from it) for the structures to hold their shapes. The style can give you some beautiful and fascinating objects.
For the model, I used cardstock and drew the crease pattern on the inside. Cardstock may have been too thick for this scale, but you can still see the geometric pattern that rounds the base. A benefit of using paper that’s too thick turned out to be that it can stand on its own closing flaps and looks kind of like a jellyfish that way. It’s even elegant as a jellyfish.