The exact origin of this recording is not documented, but it belongs to a familiar genre of German voice-note humour shared in chats and on soundboards. Eierlikör, the thick, creamy eggnog liqueur at the heart of the joke, is a staple of German home celebrations, especially around Easter and Christmas, when homemade batches change hands. The line works because it prescribes the drink like medicine, and that deadpan prescription format travels well: short, quotable German one-liners like this one get saved, forwarded and replayed as reaction audios whenever someone needs cheering up.