This is a remix of the nice "super simple hose plug parametric OpenSCAD by RacoonX", featuring sharp rectangular ribs instead of the original round ones. Also I've added a hole to mount the plug on a piece of rope or wire.

The provided stl also fits as replacement plug for the airbag of the Bogdanfly Pods.

I'd suggest a medium hard TPU to keep the part a bit flexible and strong enough.