Zolf Apostel (12 Apostles) was the 2nd brewery I visited when in Frankfurt in August, 2019. Great beer and even got a tour of the beer cellar. I like to see these small breweries in Germany. You always have the large brewers but craft beer is becoming a thing now which is great. Check out their website and stop in for a 0.5L the next time you are in Frankfurt. http://www.12aposteln-frankfurt.de/