A froth-generating insert for a container (e.g. a can of beer), a container incorporating the insert, and a method of filling the container

摘要

A froth-generating insert 10 for a container 20 has a chamber with a first opening 15 in an upper part 14 and a second opening 30 in a lower part 25. The first opening 15 may have a configuration whereby surface tension prevents gas escaping from the chamber prior to the container being opened. The insert may have a cap part 12 which snap fits onto a body part 11. The insert may be held in the container by locating means which may be at least two mounting arms 17 with arcuate flanges 18. The mounting arms may be hinged and can move between a retracted position so that the insert can pass through a restricted mouth 51, and an extended position for engagement with the container walls. In two further embodiments, a container 20 is provided with an insert 10, and a method of filling and sealing is used to flush the insert with non-oxidising gas and then pressurise the container during pasteurisation so that some beverage enters the chamber of the insert. When the container is opened, gas escapes from the first opening in preference to the second opening to generate froth in the beverage.