This is a fishing bobber that I designed. It has a slot in the side so it can be put on a line above an existing rig rather than needing to thread the line through. Just slip the line through the slot and push the stopper in the hole to hold it in place.
I printed them in PLA. I print the float with 5% gyroid fill and the stopper with 25% gyroid fill.
The author marked this model as their own original creation.