I just remixed the GoPro Mount and Bottle Cap together to create a mount for the GoPro that could attach to a Pet bottle. Here are my uses for this contraption.

1. GoPro floats if it gets dropped off the boat
2. Add some water to the bottle, cap it and flip it upside down to film underwater in pools, aquariums, etc.
3. Add enough water to the bottle to keep the camera upright and it can float and film above the water around the pool.