What are haggis bags?

Haggis bags are traditionally used in Scottish cuisine to prepare haggis, a savory pudding made from sheep's offal mixed with oats, spices, and other ingredients. The mixture is typically encased in the animal's stomach or, more commonly in modern recipes, in synthetic casings. The bags are then boiled or steamed to cook the haggis, allowing the flavors to meld. While the term "haggis bag" might also refer to the container used for serving or transporting haggis, it primarily signifies the cooking method.