A caboose served as a home away from home for railroad men and reflected the individuality of its crew. The conductor and brakeman could prepare a hot meal, catch up on needed sleep, wash off grease and coal dust, and finish daily tasks while protected from the elements. From the cupola, they could survey the entire length of the train for hazards or mechanical problems. The caboose also provided warmth and storage for the tools and supplies of the trade, including oil or coal for the stove, kerosene for the lamps, and wrenches, packing bars, nuts, bolts, and railroad spikes for minor repairs and maintenance to the train or track. Most railroad companies no longer use cabooses, as modern technology has replaced them with electronic sensors and warning devices.