This festive season, beer brands are demonstrating their dedication to classical Christmas songs and creating their own modern versions of festive tunes. Grolsch has recently unveiled its own adaptation of the ‘Oh, Christmas Tree’ (‘O Tannenbaum’) carol—the best known version of which was  written in 1824 by Leipzig-based teacher Ernst Anschütz (the melody is an old folk tune). The beer brand created a video Christmas card, which features the Swingtop Philharmonic Orchestra playing the iconic melody on green bottles.