Does Wal Mart Sell Dry Ice?
Most Walmarts do not sell dry ice. You can usually find it at your local hardware store. To find out if your local Walmart does sell dry ice visit http://www.walmart.com/cservice/ca_storefinder.gsp.
Not all Wal-Marts carry identical stock. It would be best to contact the Wal-Marts in your area to find out if any carry dry ice.