Method of cooling a draught alcoholic beverage in a vessel

摘要

A draught beverage 170 which may be alcoholic or non-alcoholic, for example a lager or cider in an open-topped drinking vessel or glass 172 . The beverage comprises a water content and dissolved gas content. The draught beverage is dispensed from a font at a cooled temperature below the freezing point of water at ambient atmospheric pressure. The dispense temperature may be in the range of -1° C. to -12° C. The beverage in the glass may or may not be subjected to external excitement energy, for example ultra-sound, to encourage formation of nucleation sites in the beverage. Either way dissolved gas bubbles out of the beverage causing occurrence of nucleation sites at which ice 188 A, 188 B from the water content forms. At least in part the ice has a slushy character. A head 174 also forms on the dispensed draught beverage and below the head the ice 188 A, 188 B locates and develops downwards into the beverage.