Most of today’s finished goods find their way into a distribution warehouse. To complete their trip to a retailer these goods are selected through picking techniques: paper, barcode, robot and voice. The goods, once picked, have to be shipped to their final retail destination. This is where many closed loop operators are beginning to employ reusable shipping containers with RFID. By equipping these containers with RFID tags the containers can be tracked throughout the whole fulfillment, delivery and return cycle. The tracking can be accomplished with little to no human intervention. This trend first started using beer kegs in the UK. It was important to know what beer was being shipped, to what establishment and when the beer was made. By using beer kegs equipped with RFID tags, the beer maker was able to retrieve emptied kegs and reuse them in a timely and cost effective way as well as report on the timeliness and accuracy of all deliveries. In addition they had a complete audit trail of the keg and the usage history. The benefit to the whole process was fresher beer on tap, fewer kegs in the whole supply chain and improved customer service. Similar processes are at play for the big box retailers, many of whom have dedicated distribution centres and almost daily fulfillment schedules. These operators are equipping totes and other shipping containers with RFID tags. These tags uniquely identify each and every container that is shipped. The RTI systems are also being used to track partial finished goods as part of a WIP (Work in Process). The goods may be moving within a plant or across a city.