Iwata HP-B airbrush cup cap

so this is my design of a cap for the Iwata HP-B airbrush, because it is a small cup, no cap is available so i made one,
it should ideally be printed in TPU at 100% infill, i added a ring to stop it being lost, hopefully other people will find it as useful as i do, it is so easy to forget and spill paint everywhere, but no more !
no supports or brims etc necessary
Ankermake /Eufymake M5C printer . Jayo TPU filament
NOTE
The cap appears slightly oversized, but this is necessary to stop it slipping off due to the design of the airbrush cup, this design was concluded after many iterations and testing, the hole is a breather hole and is necessary.