O/O Brewing is a small brewery at Hisingen in Gothenburg. The founders, Olle and Olof, started as homebrewers and have grown to own and run their own brewery. The ambition is to make a wide range of highly drinkable beers, ranging from pilsners, IPA:s and porters. The brewery also offers a tour of the brewery at Exportgatan 35 with beer tasting at Ivans Pilsnerbar afterwards on Ringön, Hisingen.