Update 07.01.2024: The thickness of the strap has been reduced. Now it bends easily.

Created of a flexible material for Citroen C4 (2009, EP6) because I'm tired of buying plastic caps that always break. 

The landing size of the tank neck is indicated in the last two photos. I think this cap will fit many cars.

Print in the position as in the STL file (logo to the bed). 

The photo differs from the STL — made a change: the groove of the windshield washer symbol was expanded.

Printer brand: Flying Bear
Printer: Ghost6
Rafts: No
Supports: Yes. I printed 20% — it was too tight, I think it should have been no more than 10-15%.
Resolution: 0.2
Infill: 100%
Filament brand: Esun, Creality
Filament material: eTPU-95A grey, CR-TPU blue
Slicer: Ultimaker Cura 5.2.1
Printing temperature: 240 Celsium
Build plate: No heat
Print speed: 10 mm/s
Fan speed 50%