Sunday’s ad is for Bier, from 1962. From the late 1800s until the 1960s, poster art really came into its own, and in a lot of really cool posters, many of them for breweries, were produced. I’m not exactly sure who or what this poster was created for. It was produced by the well-known German artist Heinz Fehling.
While it doesn’t help much, there are versions that include the text “Durst wird durch Bier erst schön” which Google translates as “Thirst becomes beautiful through beer.” And while a nice sentiment, it really doesn’t help solve the mystery of this poster’s purpose.