No idea if you have already evaluated it long time ago, for me it's a new thing at least. :-)
The Key Strap, but instead of two carabiners one of them is an o-ring.
Think it might be quite good for "extending" the o-ring in the bags, and also makes it a bit
better than clipping two carabiners into each other (in case of the pouches etc).
Good or bad idea? :)