Abstract: An ammunition holder fits into a vehicle cup-holder, for organizing gun-shot shells and rifle cartridges in a pattern of open-topped, closed-bottom bores in the top of the holder. The shells and cartridges are held in separate, spaced bores, so that they do not touch and so that they are individually removable by lifting up on the exposed top ends of the shells/cartridges. The ammunition holder is slidably received in the cup-holder, preferably without tools, adhesives, or fasteners, and the shells and cartridges are also slidably received in the holder without fasteners or other obstacles to removal. The shells and cartridges do not hang from the holder but rather stand upright and loose in the bores, resting on the floor walls of the bores.