Carbonated beverage bottle

Claim 1

An improved container for storing and dispensing a carbonated liquid, said container comprising: a. a substantially rigid outer container in the form of a bottle having a neck extending upwardly to a bottle mouth defined by an annular upper rim, said bottle being otherwise imperforate; b. an inner collapsible pouch disposed within said bottle for containing said liquid, said pouch being formed from a substantially non-elastomeric material which is impervious to liquids and to carbon dioxide gas, said pouch having a neck extending upwardly through said neck of said bottle and being otherwise imperforate to thereby define with said bottle an air space between said pouch and said bottle, said neck of said pouch terminating in an upper open mouth whereby said liquid may be poured from said pouch; c. cap means for closing said open mouth; and d. valve means for admitting air from the ambient atmosphere outside said improved container into said air space when said cap means is removed from said pouch and for isolating said air space both from the interior of said inner pouch and from said ambient atmosphere when said cap means is installed, whereby said air inside said air space is compressed by carbon dioxide escaping from said liquid while said cap means is installed.