Adventure Backpacks

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

Type	Obtained	Special Ability / Method of Acquisition
Bat	Craft	Provides a permanent Night Vision buff while worn.
Bookshelf	Craft	Adds +10 enchantment power when worn near an enchanting table.
Cactus	Craft	Slowly fills the backpack tank with water if the player is standing in water or in rain. Can also be placed on the ground to fill with water while it's raining. Damages on contact when placed.
Chicken	Craft	Periodically drops an egg near the player.
Cow	Craft	Slowly converts wheat in the backpack's inventory to milk.
Creeper	Craft	Plays a creeper hiss sound when sneaking near another player.
Deluxe	Loot	Found rarely in Stronghold chests. Cosmetic only.
Diamond	Craft	Changes to an Electric backpack when the player is struck by lightning while wearing it. Cosmetic only.
Dragon	Craft	Provides permanent Night Vision, Fire Resistance, Damage Boost, and Regen II buffs while worn. Requires a Dragon Egg.
Electric	Special	Get struck by lightning while wearing a Diamond backpack. Cosmetic only.
Glowstone	Craft	Emits a light level of 15 when placed on the ground.
Horse	Craft	Makes tamed horses follow the player while worn; may or may not work.
Iron Golem	Craft	Negates all fall damage while worn.
Melon	Craft	Slowly fills the backpack tank with melon juice if the player is standing in water or in rain. Can also be placed on the ground to fill with melon juice while it's raining.
Mooshroom	Craft	Slowly converts wheat in the backpack's inventory to mushroom soup.
Ocelot	Craft	Scares away creepers while worn. Creepers may still explode if you get too close though.
Pig	Craft	Randomly oinks while worn. Changes to a Pigman backpack when the player is struck by lightning while wearing it.
Pigman	Special	Get struck by lightning while wearing a Pig backpack. Provides a permanent Fire Resistance I buff while worn.
Rainbow	Craft	Provides Jump Boost I and Speed III buffs after eating a Golden Apple while worn. Also plays NyanCat music and gives the player musical note particles. Buffs and music last approximately 2m30s.
Redstone	Craft	Emits a redstone signal of 15 when placed on the ground, similar to a Redstone block.
Skeleton	Craft	Arrows stored in the backpack can be fired from a bow in the player's inventory.
Slime	Craft	Provides a Speed buff during a full moon at night time. Makes the player glide while moving, similar to walking on ice. Plays slime sounds and displays slime particles while the player is running.
Spider	Craft	Allows the player to right-click a spider to tame and ride it. Converts modded spiders to vanilla after they're tamed.
Squid	Craft	Provides a permanent Water Breathing buff while under water.
Sunflower	Craft	Slowly fills the player's hunger and saturation bar while in direct sunlight.
Villager	Trade	Trade a (type? cost?) Villager to get this backpack.
Wolf	Craft	Makes nearby hostile wolves passive while worn.