bucket
n.— «In the 1960s, about 80,000 M113s were built, many of which are still in use. “Some of the military people refer to it as a bucket because of the noisy ride.”» —“Sheriff’s Office acquires its own armored vehicle” by Lory Pounder St. Augustine Record (Florida) Feb. 11, 2006. (source: Double-Tongued Dictionary)