Abus Bordo folding locks have been on the market for years. Each metal lock folds into a compact package that can be mounted to the bike frame or carried in a backpack. The lock unfolds into a series of riveted links that offer flexible locking configurations. The Bordo line features a number of different models designed for different levels of security.
At last month's Eurobike show, Abus released the Bordo 6000 Ecolution, which brings a little extra eco cred to the Bordo series. When it's time to retire the lock, it can be broken down into its individual components and recycled. Abus also uses eco-friendly coatings for the lock bars and lock body.
Being able to recycle the Bordo 6000 may serve you well. Reviews are mixed, but some say that the lock's joints are easy to manipulate and break. A review published by BikeRadar said that the rivet popped off within just 46 seconds of tampering. So, you might just be recycling those lock components sooner than you think. To be fair, Abus describes the Bordo 6000 as a "medium theft risk" lock, and it's probably ample in short-term, high-traffic scenarios where a deterrent will suffice.
If you're looking for something beefier, Abus also debuted the uGrip plus 501 at Eurobike. It describes that model as the "securest of locks in the uGrip family."