Adventure Backpacks

Adventure Backpacks is a mod that adds its titular item - backpacks - in quantity, along with several early game transportation/travel items. Most backpack variants are purely cosmetic, but a few have special abilities that vary from amusing to indispensably useful. All backpacks offer eight buckets of fluid storage, 48 slots of item storage and two special tool slots.

Adventure Backpacks
Right-click in the air to open a backpack, right-click on the ground to place it. Backpacks placed in-game can be broken with a hand or tool to collect them, and keep their contents. Adventure Backpacks can be worn by opening the interface and clicking the button in the lower left corner showing Steve wearing a backpack and a green arrow.

Keybinds & Tool Cycling
While equipped, backpacks can be accessed with a keybind (default B) and the equip button will change to a unequip button with a red arrow. A second keybind for Actions is used when working with Hoses and activating flight for the Coal Jetpack and Copterpack. When a normal backpack is equipped, the Action key toggles tool cycling off/on. Both keybinds can be configured with. The two green slots on the lower left can only hold tools, and are used for the Tool Cycling feature. When enabled (default N), tools (and only tools) can be placed in the two green slots, and swapped with the currently equipped tool with Sneak+Scroll wheel. At least one tool has to be stored for tool cycling to function, preferably two.

Sleeping Bag
Hold SHIFT to change the equip/unequip button to the Sleeping Bag icon. This will let the player sleep, if it's night as long as the ground is solid blocks and unoccupied. While placed in-game, the sleeping bag button is automatically available.

Portable Crafting
The lower right 3x3 corner of the backpack inventory is special, and doubles as a crafting grid. Tinker's tools can be repaired by placing them in the center square with the pickaxe icon, and the repair material in any other brown square.

Tanks
Adventure Backpacks can hold up to eight buckets of liquid, in two separate tanks. Fluids can be loaded/unloaded via the bucket icon slots in the upper left and right of the GUI, or with the Hose. While holding the Hose, Shift+Scroll Wheel to cycle between Drink, Suck and Spill modes. Drink has the player consume the fluid, Spill dispenses fluid from the current tank, and Suck collects the fluid into the selected tank. The active tank can be changed with the Action keybind (default N). Drop the Hose into a backpack tank with fluid to void the liquid in that tank.

A reference for the | Adventure Backpack abilities. Any backpack not listed on this table is craftable and purely cosmetic.