Sack

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A sack, previously called an empty sand bag, is a container item.

Usage

Container

A sack has poor capacity and weight reduction, and is exceeded by the much more common garbage bag. Unlike the other baggage items, a sack cannot be found with items spawned inside, but its filled variants (excluding the compost bag) can be found throughout the world.

Filling with terrain

If the player has a spade shovel, a sack can be filled with dirt, sand, or gravel. To do so, right-click a patch of grass/dirt, sand, or gravel, and select "Take some [Material]". One sack can be filled with 4 tiles of material, and will be turned into the respective material bag.

The dirt bag can be used to spread dirt over a tile, allowing it to be tilled for farming.
The sand bag is used in a carpentry recipe, constructing a bulletproof sandbag wall.
The gravel bag is also used in a carpentry recipe, constructing a bulletproof gravel bag wall.

Any bag can be emptied onto a tile, changing it to the contained material. Once the bag is emptied, the sack will be returned to the player.

Right-clicking on a full composter while the sack is in the player's hand will display the option to "take compost", upon which the sack will be replaced with a compost bag.

Filling with food

Several foods can be stored in a sack and converted into an item with a unique name and a carry weight of 2.0: regardless of contents. This is similar to making a box of nails in that it combines the items; However, unlike the box of nails it does require the sack container.

In some cases, the items would weight less unpacked (ex, Cabbage) while in others it would be more beneficial to sack them (ex, Cherries).

Food within the sack still has a spoilage rating and will still rot, but the entire container can be placed into a freezer and will be preserved like any other food. The only advantage to doing so is that combining the items into their sack form will set the spoil rate of all items to the same (appears to be an average of, further testing required).

Sack of 'x'
Food	Encumbrance in sack form	Capacity	Loose encumbrance
Apple	2.0	12	2.4
Bell Pepper	2.0	12	2.4
Broccoli	2.0	12	2.4
Cabbage	2.0	8	1.6
Carrots	2.0	12	2.4
Cherry	2.0	16	4.8
Corn	2.0	12	2.4
Eggplant	2.0	12	2.4
Grapes	2.0	12	2.4
Leek	2.0	12	2.4
Lettuce	2.0	8	1.6
Onion	2.0	12	2.4
Peach	2.0	12	2.4
Pear	2.0	12	2.4
Potato	2.0	12	2.4
Radish	2.0	12	1.2
Strawberries	2.0	16	1.6
Tomato	2.0	12	2.4

Distribution

The loot distributions can be found in the table(s) below.

EmptySandbag distribution Show / Hide

Effective chance calculations are based off of default loot settings, and median zombie density. The higher the density of zombies in an area, the higher the effective chance of an item spawning. Chance is also influenced by the lucky and unlucky traits.

Containers
Building/Room	Container	Effective chance
all	crate	0.53%
burgerkitchen	counter	12.41%
cafeteriakitchen	counter	12.41%
deepfry_kitchen	counter	12.41%
dinerkitchen	counter	12.41%
farmstorage	crate	6.29%
farmstorage	metal_shelves	6.29%
fishchipskitchen	counter	12.41%
jayschicken_kitchen	counter	12.41%
kitchen_crepe	counter	12.41%
restaurantkitchen	counter	12.41%
seafoodkitchen	counter	12.41%
spiffoskitchen	counter	12.41%
toolstore	counter	6.29%
toolstore	shelves	6.29%
westernkitchen	counter	12.41%

Vehicles
Type	Container	Effective chance
Ambulance	Trunk	10.78%
Carpenter	Trunk	10.78%
Clothing	Trunk	10.78%
Construction Worker	Trunk	23.28%
Distillery	Trunk	10.78%
Doctor	Trunk	10.78%
Electrician	Trunk	10.78%
Farmer	Trunk	10.78%
Fire	Trunk	10.78%
Fisherman	Trunk	10.78%
Fossoil	Trunk	10.78%
Golf	Trunk	10.78%
Groceries	Trunk	10.78%
Heralds	Trunk	10.78%
Mass Gen Fac	Trunk	10.78%
McCoy	Trunk	10.78%
Metal Welder	Trunk	10.78%
Painter	Trunk	10.78%
Police	Trunk	10.78%
Postal	Trunk	10.78%
Ranger	Trunk	23.28%
Ranger	Trunk	10.78%
Survivalist	Trunk	10.78%
Taxi	Trunk	10.78%
Transit	Trunk	10.78%
Heavy	Trunk	10.78%
Sports	Trunk	10.78%
Standard	Trunk	10.78%

Vehicles

Profession	Container	Rolls	Chance
Construction Worker	Trunk	5	2

Code

Code snippet! This section contains source code from Project ZomboidShow / Hide

Source: ProjectZomboid\media\scripts\clothing\clothing_bags.txt

Retrieved: Build 41.78.16

item EmptySandbag
    {
        DisplayCategory = Container,
        Weight	=	0.1,
        Type	=	Container,
        WeightReduction	=	10,
        Capacity	=	15,
        DisplayName	=	Sack,
        Icon	=	SandbagEmpty,
        RunSpeedModifier = 0.99,
        ReplaceInSecondHand = Bag_Sandbag_LHand holdingbagleft,
        ReplaceInPrimaryHand = Bag_Sandbag_RHand holdingbagright,
        WorldStaticModel = SandBag_Ground,
        Tooltip = Tooltip_item_empty_sack_container,
        Tags    =   HoldDirt,
    }