You’ve read all of your free items this month. To register, get added benefits and unlimited access to articles, Become a Member. Already a Member? Sign in. Advertising Age Article Abstract New Pepsi Ad Tweaks Coke With Help From Santa Cola Wars Now Involve Full-Calorie 'Blue Can' Brand as It Looks to 'Own the Summer' By Natalie Zmuda, Published on June 28, 2011 10 Want more Access, Content & Connections? Upgrade to Membership. We are glad you are enjoying Advertising Age. To get uninterrupted access and additional benefits, become a member today. Register Now Already a member? Log in.