The Brain Bucket, also known as the Bucket o' Brains, is a promotional cosmetic item for the Soldier. It is a dented metal bucket with a narrow trail of dried blood leading up from the rim, speckled by several more droplets on the bucket's handle and body.
- [Undocumented] The Brain Bucket was added to the game files.
- [Undocumented] The Brain Bucket was made tradable, craftable, giftable, and obtainable via random drops.
- [Undocumented] The Brain Bucket was added to the list of hats that can be unusual.
- [Undocumented] Fixed a typo in the description.
- [Undocumented] Added "glasses" equip region.
- The description is a parody of the advertising slogan for Kix cereal, "Kid tested, mother approved."
- The name is a reference to a slang term which means combat helmet.
The "Buckethead Zombie" in Plants vs. Zombies.