Solution

What began as a personal solution stayed that way at first.
Early versions were made only to reduce loss.
Sink slower.
Stay visible longer.
Increase the chance of recovery.
When others asked, the designs were shared freely—
STL files released without hesitation.
If someone wasn’t willing to buy,
at least they could print one and stop using PVC.
One less object lost.
One less habit reinforced.
That was enough.