Two door shower stopper, used to stop the doors from sliding past each other.
Your shower might not be like mine! The Fusion360 file is included, so you can modify it to suit your needs.
Printable without supports, though you may benefit from a brim, depending on bed adhesion. As with all functional parts (and especially if you have children), I would recommend printing this in a strong, impact resistant plastic. I used PC, but ASA or ABS would probably also work well.
The author hasn't provided the model origin yet.