Lager
The final scene, in which Mills' character finally gets his glass of lager, was reportedly filmed some weeks after the rest of the film, at Elstree Studios. Real lager had to be used to 'look right', and Mills had to drink numerous glasses full until the shots were finished, and was "a little 'heady'" by the end.
Sylvia Syms has said that (Danish) Carlsberg was chosen because they could never have been seen to be drinking a German lager. In fact the beer referred to in the original novel is Rheingold, which, although not German, has German connotations.
Scenes from the film were used in a late-1980s television advertising campaign for the German Holsten Pils lager. Each advertisement mixed original footage from a different old film (another example was The Great Escape) with new humorous material starring British comedian Griff Rhys Jones and finishing with the slogan "A Holsten Pils Production". In retaliation, rival Carlsberg simply lifted the segment in which Mills contemplates the freshly poured lager in the clearly Carlsberg-branded glass, before downing it in one go and declaring, "Worth waiting for!" This was followed by a variation in the usual Carlsberg tag-line: "Still probably the best lager in the world."
Read more about this topic: Ice Cold In Alex