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
Pittsburgh has won more Super Bowl titles (6), and hosted more (11) conference championship games than any other NFL team. The Steelers share the record for most AFC championships with the New England Patriots (8), and the record for most conference championship games played in with the San Francisco 49ers (15). The Steelers share the record for most Super Bowl appearances with the Patriots and Dallas Cowboys (8).