There's never a shower curtain ring salesman when you need one.  After decades of frustration with shower curtain rings coming undone, breaking, not being filled with helium, or not being Diane Sawyer ear rings, there's real momentum behind this idea.  As usual, the designs on the internet all suck.

After years of struggles, the lion kingdom came up with the Dell Griffith Mark 1, a single piece printable shower curtain ring.  How long it lasts, whether it stays locked, are all to be determined.

Printed a full set over 3 hours.  They also work as ear rings.