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.

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.
 * Abandoned mine shaft 4 - Upstairs in the taller shed, on a shelf between an armor workbench and a safe (Picklock 3).
 * Ammo dump - Near the raider corpse sitting at a picnic 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.
 * 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.
 * Charleston - Inside the building adjacent to the Charleston Herald building where The doctors note is found, hidden inside a broken terminal.
 * 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.
 * Grafton - Inside the building with the "Grey Tortoise" billboard, behind a locked door and underneath a desk.
 * Middle Mountain Cabins - In the eastern cabin, inside the stove.
 * 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.
 * Sam Blackwell's bunker - Inside the kitchen area, on a small table's lower shelf.
 * Sugarmaple - In an open safe in the fountain.
 * Tyler County fairgrounds - At the Nuka-Cola stand shaped like a bottle, behind the small podium.
 * 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.
 * Watoga Municipal Center - At the second floor room with a generic terminal, in a shelf.
 * Wendigo cave - At the bend where the mole rat spawns, right next to a large toolbox.