The objective of this report is to help companies manage the opportunities and risks associated with plastic use. It articulates the business case for companies to improve their measurement, disclosure and management of plastic use in their designs, operations and supply chains. In order to provide a sense of scale, the report sets out to quantify the physical impacts of plastic use translated into monetary terms. This metric can be seen as the current value-at-risk to a company, should these external impacts be realised internally through mechanisms like strengthened regulation, loss of market share, or increased price of raw materials and energy. This metric can also be used to help understand the magnitude of the opportunities, and the tangible benefits to stakeholders, including shareholders, of using plastic in an environmentally sustainable way.