Bukkit

Backpacks+ add 4 craftable backpacks with Custom sizes in the config. BackPacks+ don't use any kind of files or database to store the items it's all stored inside one item like a shulker box for example, also support fast loading and unloading from chests.

• NBT API

- A Backpack can be crafted.
- A Backpack can be stored inside a chest.
- You can rename a Backpack
- You can use custom Items as a Backpack
- You can use player heads as a Backpack
- A renamed backpack will show his name in his inventory
- You can't put a Backpack inside another Backpack.
- Players can open other players backpacks if they right click with the backpack in hand.
- The use of Backpacks can be restricted using the permissions :

• [backpacksplus.use.small]
• [backpacksplus.use.medium]
• [backpacksplus.use.large]
• [backpacksplus.use.extralarge]

- The crafting can be disabled in the config.
- The crafting can be allowed for a player using the permission :

• [backpacksplus.craft.small]
• [backpacksplus.craft.medium]
• [backpacksplus.craft.large]
• [backpacksplus.craft.extralarge]

- Destroying a Backpack will destroy all the items stored inside.
- If keep_backpack_on_death is set to false the player will loose the backpack and all the items inside will be dropped on the ground.
- While holding a backpack and enable_fast_load_unload is set to true:
( Shift + Right Click ) to unload the backpack content into a chest
( Shift + Left Click ) to load items from a chest into you backpack

Valid Recipe Example : 

small_size_recipe: LEATHER:LEATHER:LEATHER-
LEATHER:ENDER_CHEST:LEATHER-
LEATHER:EMERALD:LEATHER​

You need to specify the 3 material for each line in the crafting table if you want a blank spot in the crafting table you can use the Material AIR 
"-" represent the end of the line
":" represent the separation between every material in a line

[backpacksplus.use.small] Let you use the small Backpack
[backpacksplus.use.medium] Let you use the medium Backpack
[backpacksplus.use.large] Let you use the large Backpack
[backpacksplus.use.extralarge] Let you use the extra large Backpack
[backpacksplus.craft] Let you craft the Backpacks
[backpacksplus.create] Use /bpp create <backPack>
[backpacksplus.reload] Use /bpp reload
[backpacksplus.help] Use /bpp help
[backpacksplus.permission] Use /bpp permission

/bpp help: show all Backpacks+ commands
/bpp reload: reload the config
/bpp create <backPack>: create a backpack
<backPack> : small - medium - large - extra_large
/bpp permission : show all Backpacks+ permission

chat_line_color: '&2' # The Line color in the chat
loading_from_chest_message: '&2%count% &ritems added to the &2Backpack' #the message shown when a player load item from a chest.
unloading_to_chest_message: '&2%count% &ritems added to the &6chest' #the message shown when a player unload items to a chest.
enable_crafting: true # Make the backpacks craftable
keep_backpack_on_death: true #if set to true the backpack will drop as an item, if set to false the backpack get deleted and the items inside drop on the ground
enable_fast_load_unload: true # Enable Fast loading and unloading items from backpacks to chests
custom_item: EMERALD #The items used to represent the BackPack, you can use PLAYER_SKULL to use a player head
skull_name: MHF_Chest #The name of the player to use
small_packpack_description: A Small BackPack # The Lore of the Small Backpack
medium_packpack_description: A Medium BackPack # The Lore of the Medium Backpack
large_packpack_description: A Lore BackPack # The Lore of the Large Backpack
extra_large_packpack_description: An Extra Large BackPack # The Lore of the Extra-Large Backpack
small_size: 18 # Small Backpack size 2*9
medium_size: 27 # Medium backpack size 3*9
large_size: 36 # Large Backpack size 4*9
extra_large_size: 54 # Extra-large Backpack size 6*9 (the max is 6*9)
small_size_recipe: LEATHER:LEATHER:LEATHER-LEATHER:ENDER_CHEST:LEATHER-LEATHER:EMERALD:LEATHER
medium_size_recipe: LEATHER:EMERALD:LEATHER-LEATHER:ENDER_CHEST:LEATHER-LEATHER:EMERALD:LEATHER
large_size_recipe: LEATHER:LEATHER:LEATHER-LEATHER:ENDER_CHEST:LEATHER-EMERALD:EMERALD:EMERALD
extra_large_size_recipe: EMERALD:EMERALD:EMERALD-EMERALD:ENDER_CHEST:EMERALD-EMERALD:EMERALD:EMERALD
#"-" represent the end of the line in the crafting table
#":" represent the separation between every material in a line

Backpacks Bank (store the backpacks with unlockable slots)
Fast loading and unloading items from backpacks to a chest - Added in 1.0.3
Custom Crafting Recipes - Added in 1.1.2
Custom Backpack Item - Added in 1.1.0
Player head as a Backpack - Added in 1.1.3
Customizable messages - Added in 1.1.4
...
- leave any suggestion you have in the discussion section and I'll must likely add it.

You are not allowed to decompile the source code!
You are not allowed to re-upload the plugin!
You are not allowed to include the source code in your plugin!
You are not allowed to claim this plugin as yours!

This plugin is still in development and might contain bugs, if you find a bug please report it in the discussion section.

when reporting a bug please provide these information:

• Server Software (Spigot, Bukkit...)
• Server Version (1.11, 1.12...)
• Backpacks+ Version
• Output in the console
• Description of the Bug