About Barrel Mill The Barrel Mill is a cooperage in Central Minnesota specializing in Premium Wine Barrels and Infusion Spirals. Our products are made from the finest Oak we can find. Hand-selected and aged to perfection. Our family has been in the lumber business for over 90 years. In 2004 an opportunity arose to buy a cooperage that had gone out of business. Through our knowledge of wood, extensive investments in new machinery and technology, we have built a brand that represents quality aging products for the beverage industry and custom wood displays for marketing all sorts of products.