It cannot fit a full set of billiard balls inside of it, only taking about 4 balls.
They are pretty difficult to find in the Wasteland as there aren't many of them and they are mostly found on pool tables.
- One in the Museum station, inside raider rec-room.
- One in the Rivet City market.
- One in the Talon Company outpost near the Arlington Library.
- One in the Arlington Library, in the media archives.
- One at Tennpenny tower, in the Federalist Lounge.
- One in Paradise Falls, in the barracks.
- One in the Old Olney underground, in the eastern-most chamber, upstairs next to the pool table.