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
Jameson Irish Whiskey thereafter, the introduction of prohibition in the United States. While Scottish brands could easily slip across the Canada–US border, Jameson was excluded from its biggest market for many years. The introduction of column stills by the Scottish blenders in the mid-19th-century enabled increased production that the Irish, still making labour-intensive single pot still whiskey, could not compete with. There was a legal enquiry somewhere in 1908 to deal with the trade definition of whiskey. The Scottish producers won within some jurisdictions, and blends became recognised in the law of that jurisdiction as whiskey. The Irish in general, and Jameson in