Scuba diving regulator DIN cap

Scuba diving regulator dust cap. I used emotion flex 1.75mm filament. It's my first print with this flexible filament and result is very satisfactory. My settings:
Print: 15mm/s; Layer:0.3; print temp:250°, bed temp:90°
It should be better to use small brim around the cap.

27/08/2018: I added bubbles and words around the cap.
Settings:
Print: 15mm/s; Layer:0.1; print temp:250°, bed temp:90°, 1cm brim.
Infill 100%: 14g of flexible filament used.
Around 8 hours to print with 0.1 layer in black but result is very good.