1516. www.redoakbrewery.com. Pure - Brewed according to the 1516 Reinheitsgebot Purity Law. Only Bavarian malted barley, noble hops, & lager yeast. Pure - Brewed without any of the 400 additives & preservatives allowed in US beers. Fresh - Real Bavarian style lager. Unfiltered and unpasteurized for a rich, smooth taste. Brewed by Red Oak.