Flip-top

A flip-top, swing-top, lightning toggle, or Quillfeldt stopper (after the inventor, Charles de Quillfeldt) is a type of bail closure frequently used for bottles containing carbonated beverages, such as beer or mineral water.

The mouth of the bottle is sealed by a stopper, usually made of porcelain or plastic, fitted with a rubber gasket and held in place by a permanently attached wire bail.

The flip-top was the dominant method of sealing beer and mineral water bottles prior to the invention of the crown cork.

The first flip-top closure was created by Charles de Quillfeldt in the United States, who filed for a patent on 30 November 1874.

[4] Many homebrewers prefer flip-top bottles, since they are easy to close after filling, and negate the need of a separate capping device.