Kirkland Signature Ultra Shine dish soap

Kirkland Signature Ultra Shine is a high-performance dishwashing liquid designed for effective grease removal. It is the private-label brand of Costco Wholesale, developed to provide members with quality comparable to national brands at a lower price point.

The brand was established in 1995 in the United States, named after the city of Kirkland, Washington, where Costco's headquarters were located at the time. Most Kirkland Signature liquid cleaning products are manufactured in the United States by third-party suppliers, though specific manufacturing can occur in various regions to supply local Costco warehouses worldwide.

Costco Wholesale Corporation remains the ultimate owner and distributor of the product, maintaining strict quality control over its production and supply chain to ensure consistency across its global retail network.