An item in Kantai Collection. Appears as a green bucket with "復材" (fukuzai, "recovery material") printed on it.
Its main function is to repair ships instantly. For new admirals, this equipment is rarely used or needed, but to experienced ones, it's vital equipment for ships like battleships and aircraft carriers which have ungodly long repair times that often range from hours to even days.
It is unknown exactly what's inside the bucket, though in the anime it's a magical liquid that can cause a ship girl to experience intense pleasure as a side effect of its use.
The tag can be used on containers based on the repair bucket (e.g. as a drinking glass on post #2453713 and as an ice cream tub on post #2364987) as it is not currently implicated to "bucket". (see topic #13619)