Bag

A bag is a miscellaneous item in Fallout and Fallout 2 and an unused item in Fallout Tactics.

Characteristics
A bag can be used to organize the contents of the player character's inventory. It can contain any items that total less than about 20 lbs, but cannot contain larger items such as armor.

Fallout

 * Sold by a trader in the east part of Shady Sands.
 * Another one can be found inside Gizmo's Casino in Junktown, on a bookshelf in his personal room.
 * One on a bookshelf in Jon Zimmerman's basement in Adytum.
 * A rare version of the bag can be found in The Cathedral, on the top floor in a locker.
 * The wandering (random encounter) merchants Terrance and Julian carry the rare version of the bag.
 * Random encounters on the coast sectors.

Fallout 2
The only bag in the entire game is in Modoc's caves, in the bottom-left tip of the crescent formed by the rat's nest. It requires pinpoint accuracy to tag and obtain.