Welcome the return of the Bottle chain. An early 2000's design, this Coke bottle-shaped link had a solid 10 year run before slipping into obscurity.

Originally paired with a hook and loop, before long I started using a handmade and beefed up version of a tin-tamped Sister clasp. The Sister clasp is an enduring and clever mechanism. And despite its lack of springs, when built correctly, it's a very safe closure.