In this small brewery not far from the city centre, Katte now brews 12 beers “with the help of a professional brewer and a lot of volunteers”. De Koperen Kat produces merely 4,000 litres of beer per month and all bottles are labelled by hand, but the quality of the products is undisputed. Its Delftse Donderslag (‘Thunderclap’) was announced Best Dutch Autumn Bock Beer in October 2015 by a jury of over 140 people, “the biggest independent beer jury in the world”. Katte: “This was the first time we entered that competition. It felt really good to have beaten all the big breweries and a confirmation that our beers must be not so bad.”