The term bellows is used by extension for a flexible bag whose volume can be changed by compression or expansion, but not used to deliver air. For example, the light-tight (but not airtight) bag allowing the distance between the lens and film of a folding photographic camera to be varied is called a bellows.
What NFL has lost the Super Bowl the most? The Buffalo Bills, the Denver Broncos, the Minnesota Vikings, and the New England Patriots have all lost four Super Bowls. Edit
Teams to have never won a Super Bowl: Buffalo Bills, Cincinnati Bengals, Cleveland Browns, Houston Texans, Jacksonville Jaguars, Tennessee Titans, Arizona Cardinals, Atlanta Falcons, Carolina Panthers, Detroit Lions, Minnesota Vikings, and Philadelphia Eagles. If the Panthers would have won this year, it would have been their first championship. Many other teams have gone to the Super Bowl, but have never won it. The Vikings and the Bills have both gone to the Super Bowl four different times and never came away with a championship. The Browns, Texans, Jaguars, and Lions have never made it to the Super Bowl.