This is 3d printable cap holder for 58mm lens caps. It allows you to easily attach lens cap to a bag with 1'' MOLLE straps on it.

The idea behind this thing is, that when I take my camera out of bag and take off the lens cap, it's not convenient for me to put it in the pocket. I wanted to have the ability to somehow attach lens cap to my photo bag exterior, so it will be in plain site when I'll put camera back. So I designed this holder. I've printed it with PET-G filament, and it worked just fine. Well, I think someone can find it useful, so here it is :)

I'll add versions for other lens diameters later, but feel free to contact me if you need specific size.