November 7, 2011 No Comments FREE Sample of Kirkland Signature Diapers (Costco Members Only) Fill out the form to request a FREE sample of Kirkland Signature Diapers. Costco member id is required. Copy / paste the link below in your browser to go to the sample request form: – EXPIRED Facebook Twitter Add Comment Notify me of follow-up comments by email. Notify me of new posts by email.