This is an quiver for DIYPark's repeating mini crossbow. It holds five shots and should be just snug enough that the toothpicks don't fall out, but you can retrieve them easily. Really depends on the tolerances of your toothpick but mine are around 2.2 mm.

I imagine additional features can be added like a top or side mount for the crossbow or a base to display the quiver at an angle, but I'm out interest/time for now.