Here is a brief article from rimag.com:
Green Trends: Foodservice Contractors Adopt Reusable To-Go Containers
Lately, college and university accounts of Gaithersburg, Md.-based Sodexo and Philadelphia-based Aramark are seeing their green efforts head right out the door with the introduction of reusable takeout containers. Students can purchase a plastic “to-go” container from campus dining halls for use in transporting their food; they’re asked only to rinse it once they’ve finished eating and then return it to a dining hall at their next to-go meal—at which point they swap their container for a clean one that dining services has run through a dishwasher.Aramark debuted its reusable to-go containers on several campuses in fall 2008; at Baylor University in Waco, Texas, disposable-container use dropped 40% over the course of the school year, Aramark reports. Sodexo launched its reusable-container program, called Green with Envy, this fall and estimates that the containers could eventually reduce disposable waste on campuses by as much as 80%.