Brouwerij 't Koelschip (The Coolship, after a traditional piece of brewing equipment used to cool the wort after boiling), full name Ambachtelijke Bierbrouwerij en Distilleerderij 'T KOELSCHIP, is a Dutch Brewer, based in Almere, which made a 60% abv beer called Start the Future.
Microbreweries may prefer to seasonally brew a bokbier, such as the eco-beer biobok, made in autumn by Brouwerij 't IJ in Amsterdam. The consumers' organization PINT holds a bok festival every autumn at the Beurs van Berlage in Amsterdam.