3D Printing 3D Printed Shower Curtain Clip Locks–Something Useful by Kristofer Brozio • April 13, 2017 I never knew I needed these until I saw someone else created them. I noticed and just dealt with the fact that our shower curtain clips would come undone, I just re-clipped them, but now I don’t have to, these just slide over the clip and lock them.