Caps stash (Fallout 4)

A caps stash is a one-time use tin full of bottle caps.

Characteristics

A blue tin full of bottlecaps. It is not an item that can be placed in the inventory, but rather like a bobby pin box in that it adds a random amount of bottlecaps. In Fallout 4, this number of bottlecaps is limited from 14-23. In Fallout 76, there is a chance that this number can go over 100 in rare caps stashes that play an animation when they are found. Companions in Fallout 4 can pick up the caps stash as an item, which the player character can take out of their inventory.

Locations

Fallout 4

All throughout the Commonwealth, particularly in raider locations.
6 in Andrew station
5 in Kendall Hospital
4 in Medford Memorial Hospital
4 in Pickman Gallery
4 in Vault 114
3 can be found at the water filtration caps stash located due east of Sanctuary Hills.
3 can be found at the Museum of Freedom, two in the offices on the third floor and one on the rooftop.

Fallout 76

Although the contents of caps stashes in Fallout 76 are instanced, the stashes themselves are not guaranteed spawns and may not spawn in the world that the player character is in. Changing server will affect caps stash spawns.

Location	Location description
Abandoned mine shaft 4	Upstairs in the taller shed, on a shelf between an armor workbench and a safe (Picklock 3).
Abbie's bunker	In the kitchen area, underneath a small cart.
Ammo dump	Near the raider corpse sitting at a picnic table (may be below the table).
Appalachian Antiques	On the second floor in the nightstand on the right side of the bed.
Beckley mine exhibit	In the middle of the playground.
Berkeley Springs	On the roof of the Delicatessen store, behind a metal shelf with a duffel bag underneath.
Big Al's Tattoo Parlor	On the building's roof, next to an imported Chinese panda.
Big B's Rest Stop	Behind the counter in the Super-Duper Mart.
Blackwater mine	Outside, near a barrel, on the ground, near a pair of dumpsters, in front of the mine entrance shack. Outside, near a barrel with a work light, on the ground, near a pair of dumpsters close to the middle of the site.
Braxson's Quality Medical Supplies	On the second floor, at a window still near the top of the stairs.
Burdette Manor	On some wooden crates in the attic.
The Burrows	Behind a gut shroom at the Burrows South, underneath a bridge to the left of Doctor Ken's chem den, close to a waterfall from a service tunnel.
Camden Park	In a rollercoaster carriage near the boarding point for the Widow Maker (third carriage up).
Charleston	Inside the building adjacent to the Charleston Herald building where The doctors note is found, hidden inside a broken terminal.
Charleston Fire Department	Southeast of the fire department building, inside a home on the second floor, on top of a bunk bed.
Clarksburg	On the roof of the hardware store, near a stuffed grizzly with a teacup. On the roof of the repair store, inside the room with a trunk, on top of the ventilation piping.
Crashed space station	At the raider shack to the south in the hills, on top of the roof. The marsupial mutation or a power armor jet pack is required to reach the highest roof.
Deathclaw island	Inside the middle of the deathclaw nest, near an eastern facing log.
Dyer Chemical	Inside the locker room building, on top of a bear trap with a trail of bottle caps leading towards it.
East Kanawha lookout	Sitting on a crate on the balcony on top of the tower.
Eastern Regional Penitentiary	Inside the reception area on the first floor, within a desk on the left. Inside the makeshift shack on the first floor in cell block A, on a table. Inside the office area near cell block A, in the corner office, sitting on a desk. At the north guard tower, next to a grounded filing cabinet on its side.
The Freak Show	By the giant roll of tickets next to the ticket taker skeleton.
The General's Steakhouse	On a desk inside the 'Employees Only' area, beside the Generals note. In the locked (Picklock 3) storage room behind the front counter, beside the Gone scrounging holotape.
Grafton	Inside the building with the "Grey Tortoise" billboard, behind a locked door and underneath a desk.
Grafton station	Inside an open train car with a sleeping bag, on a rectangular wooden crate.
Hornwright Estate	On the shelf in the dining room where Penny Hornwright's terminal is.
Hornwright summer villa	On the roof, near the stone stairs which lead to a boarded-up door.
Kanawha Nuka-Cola plant	Outside, in a trailer, within a broken terminal. Outside, on the roof, on a locker shelf above the large white 'Nuka Cola' sign. Outside, on the roof, behind a Picklock 1 door near the giant Nuka-Cola bottle of the site, on a desk.
Mama Dolce's Food Processing	On top of a filing cabinet inside a shed with a fusion generator outside.
Middle Mountain Cabins	In the eastern cabin, inside the stove.
Monongah mine	On the ground, near a blue car parked next to houses at the outskirts of the mine
Morgantown	In front of the street camp, inside a bus, underneath a seated skeleton on the left from entry. At the street camp, inside the large tent, on top of a desk. At Stash M-1, on top of the roof with the Nuka-Girl billboard, behind it at a makeshift shelter, beside two skeletons on a sleeping bag. On the northwestern roof with an 'Apartments' sign, clutched in the arm of a skeleton near a wooden crate. On the roof of the Slocum Joe's building, on a wooden crate. Near Stash M-2, at the adjacent red book store building to the left, underneath a chair at the very top of the stairs, close to the roof. On the very top roof where the Roof climber's poem can be found. Near Stash M-3, on top of a red house's roof between windows directly east of the 'Apartments' sign.
Morgantown Airport terminal	Inside a set of lockers on the bottom row, accessed by the security gates to the second floor.
Morgantown High School	Directly north of the school, at an elevated house porch, on a round table overlooking the school building.
Morgantown trainyard	In the main loading building, on a table by the south entrance.
Overlook cabin	On a shelf in the upstairs room with a collapsed floor.
Palace of the Winding Path	On top of a set of lockers to the left of the laundry room stairs. To the left of three stacked blue barrels, inside the basement's exit service tunnel.
Point Pleasant	At the Point Pleasant bus stop, underneath the arm of a skeleton.
Poseidon Energy Plant WV-06	Southwest of the building, near some tents by a red bridge. The stash is sitting on a barrel with two protest signs propped up near it. Outside, on a set of metal boxes near the workshop area. Outside, on a wind turbine machine, near a set of blue pipes in the lower middle area of the roof. Outside, in the western Cooling System area, on top of a safe at the top of the area. Outside, in the western Cooling System area, on a counter on one of the catwalks. Outside, in the eastern Cooling System area, near some radioactive barrels at the top of the area. Inside the Control Room, in a drawer of one of the consoles. Inside the basement, on top of a barrel among a large black control panel. Southwest of the building, inside a tent with a red sofa, to the right, underneath a small stool. Outside, on the roof facing the northeast, in a corner besides the workshop below.
Red Rocket filling station	On top of a cabinet in the shed. It is near a radio.
Riverside Manor	In the back corner of the garage. Beneath a bunk bed in one of the upstairs guest bedrooms.
Sam Blackwell's bunker	Inside the kitchen area, on a small table's lower shelf.
Sugarmaple	In an open safe in the fountain.
Sutton	Inside the blue house to the north, on the second floor, inside an empty part of a dresser in the hallway.
Tygart water treatment	Within the enclosed raider camp at the northeastern corner, on the ground, inside a small blue basket.
Tyler County fairgrounds	At the Nuka-Cola stand shaped like a bottle, behind the small podium.
Vault-Tec Agricultural Research Center	On the second floor, inside a locked room, on a desk in front of the doorway.
Watoga Emergency Services	In a fridge on the top floor, near the emergency exit.
Watoga High School	Behind the headmaster's desk, under his terminal.
Watoga Municipal Center	In the second floor room with a generic terminal, on a shelf.
Wendigo cave	At the bend where the mole rat spawns, right next to a large toolbox.
White Powder Winter Sports	On the second floor, underneath the front counter, near the far left cash register.
The Whitespring bunker	Inside the Resort Exit room, underneath a destroyed terminal behind the security gate.
The Whitespring golf club	At the southwestern gate on the south side of the golfing grounds, underneath a counter inside the security building.
The Whitespring Resort	Inside the Bellstand's storage room, sitting on a lower locker shelf.
The Whitespring service entrance	On top of the service station's roof, near a skeleton.
WV Lumber Co.	On a desk on the top floor of the main mill building.

Notes

The Cap Collector perk and Bobblehead: Caps increase the chances of finding more bottle caps when opening a cap stash in Fallout 76. The Fortune Finder perk also makes it easier to find caps stashes by providing an audio cue when one is approached.
Prior to patch 1.0.5.10, caps stashes were instanced server-wide and only obtainable by the first player to discover it, which tended to cause players to intentionally server-hop to collect large numbers of freshly respawned stashes. Since the patch, caps stashes have become containers instanced per-player, allowing multiple players to collect from the same caps stash, eliminating most of the benefit of server-hopping.