Bicycle Saddle Rail Bottle Cage / Tri Bottle Cage / Saddle Mount Kit GoPro clamp | eBay
GoPro The Tool - Thumb Screw Wrench and Bottle Opener by GoPro at B&C Camera
QUIST, Camera Travel Tool | Dreampick
3D Printable Gopro Camera Bottle Cap Buoyancy Adapter by Reg Taylor
GoPro Bottle-Opener, Metallic Key Chain | eBay
Amazon.com : Clarifii: Water Repellent and Anti Fog Lens Accessory for GoPro | DSLR | Drone | Prevent Water Drops Ruining Footage While Surfing, Wake Boarding, Swimming, and Snorkeling. Must Have GoPro Accessory : Electronics
Turn any soda bottle into a floating GoPro mount with Quikpod – Phandroid