Fee Brothers Black Walnut Bitter (5 OZ) is $9.99 at CBC Liquors, Westford in Massachusetts — in stock now, with pickup and local delivery. Black Walnut Bitter by Non-Potable Bitters offers a unique blend of rich, nutty flavors with a touch of botanical bitterness, perfect for enhancing cocktails. Its distinct walnut essence is complemented by a subtle herbal complexity, making it a versatile addition to any bar.