This is a vase-mode (single-wall) print for a ceiling air vent. Just take some magnets and stick it to the vent.
I have even printed this using LW-PLA to make it super light.
Wall Line Count: 1
Top Layers: 1
Bottom Layers: 2
Infill Density: 0.0
Surface Mode: Both
Spiralize Outer Contour: Yes
Smooth Spiralized Contours: Yes