Gulpener Op Stoom is a California Common brewed by Gulpener Bierbrouwerij in Gulpen, a brewery established in 1825. This beer employs an unconventional technique: Gulpener's traditional lager yeast ferments at a warm 18°C, mimicking ale fermentation. The result is a refreshing brew with bright citrus notes of lime and yuzu, layered with grassy, herbal spice.

At 6% ABV, Op Stoom delivers a full body with a dry, hoppy finish. The interplay of fruit and grass-forward character creates a lively, thirst-quenching beer that stands apart from conventional lagers.