Reusable Cups Customers Don't Need to Wash and Bring Back

Many coffee chains offer incentives like discounts or free drinks when customers come in with their own cups, but not everyone is taking advantage. A study in the National Library of Medicine estimates “nearly 16 billion paper cups are discarded yearly.” Aarhus, Denmark, is taking the hassle out of bringing your own cup. The city has installed machines that wash and return reusable cups to the coffee house, just in time for your next latte.