Not just another D.I.Y. GoPro float handle made from a bottle. This one has the perfect shape for a handle/float with a flat bottom that will accept the sticky mount perfectly.
Bottle used: Banana Boat Sport Performance Sunscreen 4fl.oz.
UPDATE: I see the bottle size has changed a bit so it is taller now. I also recommend using a tripod mount with a bolt through the cap to secure it for extreme uses vs. the sticky pad.