Clevenger Brothers Glass works was founded by Tom, Reno and Allie Clevenger in 1929. They constructed a small furnace in the stable of their backyard in Clayton, New Jersey. Their intent was to produce affordable reproductions of early American glass in the South Jersey tradition. Much of their early work was free blown except for some bottles and flasks. Each piece was hand blown and finished making no two exactly alike and each batch of glass often varied in color. The original the Clevenger Brothers was the last green system glass blowing shop of its kind in America. The green system style of glass making is almost extinct in North America. Many of the workers were retired blowers, "old timers" who still wanted to be active in the industry.