Some distributors of Costco liquor remain a mystery, but for their Kirkland XO Cognac, the label indicates that Peyrat-Associés & CIE is the company that makes it.

The French, family-owned company operates as Maison Peyrat and is the maker of various Peyrat Cognacs, including their XO Cognac, a blend of spirits aged a minimum of 15 years.

Kirkland's XO Cognac is similar in appearance to Peyrat's bottle and consists of a blend aged between 12 and 21 years. Both are 40% alcohol by volume.

However, Kirkland's bottle is slightly larger at 750 ml (compared to Peyrat's 700 ml) and significantly cheaper at under $50, while Peyrat's XO is typically over $100.