GoPro Floaty

This is a floating handle for GoPro cameras. It's only 115mm tall so it will fit on almost any printer. I have only tested it with the Hero 5, but I'm pretty sure it will float with any other GoPro camera. For reference, the Hero 5 with the frame and a battery installed weighs ~170g.

You'll need an M5 nut for the screw and a bit string or rope <4mm in diameter for a lanyard if you want (I used paracord and it works pretty well).