This week club store titan Costco is featuring its much loved private brand Kirkland Signature in it’s promotional email. The subject line of the email reads “Free Shipping on Kirkland Signature Formula, Diapers and Wipes! Plus More Items for Baby”. Costco continues to set the standard for leveraging its private brand to create points of differentiation and more importantly telling its customers about it. Great Brands and Great Products must have consistent commitment to Great Marketing.