Classes:BagOfHolding

From ZDoom Wiki

Bag of holding
Actor type	Ammo	Game
DoomEd Number	8	Class Name	BagOfHolding
Spawn ID	136	Identifier	T_ITEMBAGOFHOLDING

Classes: Inventory→BackpackItem→BagOfHolding

The bag of holding contains a sample of each ammunition type (the quantity of which depends on the ammunition, not on the backpack) and extends the carrying capacity of each ammunition type (again, this is a factor of the ammunition).

DECORATE definition

ACTOR BagOfHolding : BackpackItem 8
{
  Game Heretic
  SpawnID 136
  Inventory.PickupMessage "$TXT_ITEMBAGOFHOLDING" // "BAG OF HOLDING"
  +COUNTITEM
  +FLOATBOB
  States
  {
  Spawn:
    BAGH A -1 
    Stop
  }
}