A fire bucket is a bucket filled with water or sand which is used to prevent or extinguish fires.
Typically, fire buckets are painted bright red and have the word fire stencilled on them. Often they have a convex, protruding bottom. The rounded bottom results in a strong, directed stream of water when the water is thrown at the fire. The rounded-bottom bucket is far more efficient in launching the water at the fire than a flat bottom bucket.