The concept of a circular or closed-loop supply chain is a well-established sustainability concept in which waste materials and used goods are reused or resold to reduce costs and create less waste. Many companies have put this definition into practice. For instance, car batteries have long been recycled using closed-loop supply chains that collect and return used batteries for recycling. However, circular operations are still the exception rather than the rule. The challenge is how to introduce circularity to conventional supply chains that are designed to move product forward into markets in a linear fashion. The challenge can be overcome with creative logistics solutions.