[talmand]

Maybe the reason no one has done it is because it was already determined to not be worth the resources required to research, develop, and implement?

EDIT: I'm just asking an honest question here.

[wrsh07]

Extremely unlikely. No one did it because no one thought of it. His solution is cheap and reasonably effective.

[TheGRS]

Pretty much the equivalent of those cardboard holders you get with a cup of Starbucks coffee. Extremely simple idea, some guy just happened to think of it and run with it. Just a reminder that there is plenty of room left in the world for simple inventions and solutions to common problems.