well never had issues with bottles finding themselves out of the boat, and actually never stepped on a bottle but on the rivers here in Pittsburgh i have never touched the bottom or would want to
we haev pretty steep fines on our lake if your cought with bottles...$125/ per bottle...yes per bottle. with that said are loacl lake patorl rarely enforce the law.
I agree, I try not to rbing bottles out to the lake.
But to answer you questions I think it's easier to just keep an opener on the boat. I do have one mounted on my pontoon boat. It's a magnet and sticks to the metal and has magnets all over it that catch the cap as it pops off.