For decades, those who were often Dunkin in relation to the easily identifiable foam cups of the chains were as much as with the hot brewed drinks.
As the heat flowed through the polystyrene cups and made them difficult to handle, for many years people put an extra foam cup as insulation.
And in a nick of long-standing customers who have grown accustomed to double-cup each time they have coffee, Dunkin's helps them warm up to the new cups.
Dunkin & # 39; has baristas with pins that read "the double cup breaks up." [1
New paper cups are more environmentally friendly
At the by the time it had already begun to introduce double-walled paper cups in its more than 9,000 US stores using them in a concept store outside Boston that opened in January 2018.
The complete transition is expected to be completed in April 2020.
Most of Dunkin's 3,400 stores outside the United States have already converted to paper cups, and the remaining international stores will hit the transition target in the spring of 2020, the company says.
The chain has made several other sustainability improvements over the past decade, switched to recycled paper napkins in 2009 and moved to using bagel bags with 100% recycled paper in 2014.