Nice little stash box for the Rivian R1T hitch.

Will it fall out? It feels pretty secure so I doubt it. I installed it last week and it's still there. I printed it with PET-G.

As far as someone noticing it, it's very low key and stealthy but I suppose someone could walk off with it. If you were really concerned about that scenario, it would be easy to remix the model for a locking hitch pin. Alternately, you could just snap off the tabs in meatspace.