As a result, other professional football leagues used or use the name Bowl for their championships, such as the World Football League (World Bowl), NFL Europe (World Bowl), Arena Football League (ArenaBowl), Indoor Football League (United Bowl), Great Lakes Indoor Football League (Great Lakes Bowl) and American Indoor Football Association (AIFA Championship Bowl). The Canadian Football League nicknames one of their rivalries as the Banjo Bowl and another QEW Bowl (also known as the Battle of Ontario); like most Canadian sports leagues, however, the CFL's championship is instead known as a cup (in the CFL's case, the Grey Cup).