I stumbled upon an interesting video featuring an interesting product. He seems to be sold on it. Among other things, I'm not sure it would be worth all the trouble. Check it out.
My skepticism is that it won't be secure enough on the bottle to maintain the pressure needed for carbonation. I'd be afraid of flat beer. Hey, I have clear flat beer!!!
At the same time, it is an excellent example of finding a solution to a problem. I can't blame them for being solution providers.