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 Walmart Food-Bag Consolidation Wipes Glad, Hefty From Shelves Despite Amplified Ad Spending by Brands Last Year, Ziploc Emerges Clear Winner in Shootout By Jack Neff, Published on February 04, 2010 19 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. Become a Member Already a member? Log in.