My first thought was ooh er! The idea makes perfect sense but i am not sure how efficient it will be. I suppose less will be trapped in it and it could be really good on the black carpet we have running up the stairs.
Having another google i found this video which explains it in more detail than the photo.
I do not tend to have many pop bottles in the house unless we have a party so this may be one i am unable to try. From a frugal perspective it is brilliant. The idea of no waste and recycling appeals to me. The sensible in me says, if it does not work then it is pointless!
If you have a go let me know if the broom works :D