This mount holds a bottle of bear spray having ~54mm diameter. Shown in the photos is Sabre Frontiersman 9.2 oz.
I designed this after exploring the existing bear spray mounts, and testing one. The advantages of my design are:
I printed mine in Anthracite Gray Prusament PETG. Photos show a potato quality print because I hadn't dehydrated the filament first.
The author hasn't provided the model origin yet.