A container for dispensing and storing carbonated beverages, having an outer rigid bottle and an inner collapsible non-elastomeric pouch. A valve mechanism admit air to an air space between the outer bottle and the inner pouch when liquid is dispensed, and seals the air space when the bottle is clos...http://www.google.es/patents/US4892230?utm_source=gb-gplus-sharePatente US4892230 - Carbonated beverage bottle
