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 Thomas Street Distillery, had an output exceeding 2 million gallons per annum. By 1878, the reputation of Dublin whiskey was such that Distillers Company Ltd., a Scottish distilling firm, having built a distillery in Dublin, claimed that Dublin whiskey could sell for a 25% premium over other Irish whiskey, and that it had a demand five times that of Scotch at the time. Although these figures are likely inflated, they give an indication of the esteem in which Dublin whiskey was held, even by Scottish distillers. During this period, the four largest Dublin distilling firms, of John Jameson, William Jameson,