Co-packing & Private Label Manufacturing. #1 Co-Packer in California We Manufacture Your Dreams Co-Packing Private Labeling Formulation Co-Packer LA Co-Packer LA has the fastest turnaround time as well as a clear understanding of the manufacturing challenges of the food and beverage industry. Located in the heart of the gold country in the Northern California foothills, Mad Wills Food Company has been a manufacturer of gourmet food products since 1989.