National symbols of Ireland, the Republic of Ireland and Northern Ireland with Jameson Irish Whiskey and Tullamore Dew the main whiskey brands. Poitín, made from potatoes and with an alcohol content of up to 90% ABV, is the traditional Irish moonshine, brewed illegally since 1661, when a duty was placed on whiskey and other spirits were made illegal. According to one guidebook, ""If you see a product labelled "poteen" in an airport or a bar, it's simply a white duty-paid Irish schnapps. By definition, poteen is illegal and can't be sold."" Stout, a dark beer made using roasted oats or barley, is the national beer, with Guinness heavily promoted as a
Irish whiskey investments in establishing larger distilleries (which were more easily regulated), due to the need for economies of scale to profit from legal distillation. However, when demand for whiskey increased in the early 1800s, due to population growth, and changing consumption patterns (which saw it becoming more ingrained in Irish cultural activities), much of the demand was initially met by small-scale illicit distillers who did not need to pay tax or comply with the restrictions of the 1779 Act. In fact, so much illicit spirit was available during this period that the licensed distillers in Dublin complained that it could obtained