A flexible sphere that can be pushed, then air will be pushed through a nozzle so you can clean dust in hard to reach places, often used for camera or for example cleaning a printer. The black part is printed in makerpoint Flex45 but can be printed with any TPU based filament (as long as it is flexible)

I printed the model at 70%, make sure you don't have too may wall layers as it will be too stiff. A total of 2 wall layers works perfectly for me, you results may vary depending on the filament.

Top nozzle part is green ABS, but can also be pla or something else. I just like the green colour. No supports or any post processing other the glue the nozzle in place with superglue. Make sure that the tpu is not covered in super glue as this stiffens the material.