Billy Big Balls Mug by Norn Iron Tees. This unique 11oz Norn Iron mug is perfect for enjoying a cup 'o tae and a wee biccy. Crafted with care, our mugs are guaranteed dishwasher and microwave safe, ensuring convenience and durability. Norn Iron Tees brings you this fabulous mug, inspired by the vibrant culture of Northern Ireland. So, whether you're a local or a fan from afar, sip your favorite beverage in style with the Billy Big Balls Mug. Order yours today and add a touch of Norn Iron charm to your daily routine.