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
The 13 NFL teams that have never won a Super Bowl. There are still 13 franchises that have never secured a Super Bowl championship, including four teams who have never even made it to the big game -- the Cleveland Browns, Detroit Lions, Houston Texans and Jacksonville Jaguars. After winning Super Bowl 50, the Denver Broncos became the ninth franchise to win at least three Super Bowls. The Atlanta Falcons would attain the franchise's first Super Bowl championship with a win on Sunday and effectively remove themselves from the list of franchises that have never won a Super Bowl.