Origami Hendecagon Top Hat
Origami Tetradecagon (14 sides) example top hat.
Similar in appearance to the hendecagon one.
Instructions (module)
The last fold will be used as a reference angle to fold the 3 sides of the module.
Assembly
For a sturdy structure I recommend using glue, but if you want a glueless variant, you can try to add a fold like this (or similar):
