I integrated a keyring/split ring, covered with paracord, to add the circle/ring to the crown sinnet cross. The same can be done with the many paracord knotted cross variations to get the Celtic cross type look.
Paracord canteen cover, Flat Pack Canteen from County Comm. Mostly done with basic square knotting/macrame knot work, with finishing up the bottom causing quite a bit of consternation, settling with some sewing to end it. feet of paracord used.