A Zippo lighter is a reusable metal lighter produced by Zippo Manufacturing Company of Bradford, Pennsylvania, United States. Thousands of different styles and designs have been made in the nine decades since their introduction, including military versions for specific regiments. Zippo lighters have been sold around the world and have been described as "a legendary and distinct symbol of America." In 2012, the company produced the 500-millionth unit. Since the company's inception, Zippo lighters have been primarily manufactured in the United States, although the company ran an operation from 1949 until 2002 in Niagara Falls, Ontario, Canada.