The Dunkin� coffee chain says customers will have to do without a �double cup� for their iced drinks.

A new campaign focused in Massachusetts and Rhode Island tells customers they can no longer nest their iced drinks in a second, foam cup for extra insulation as the company moves to eliminate its polystyrene cups.

The brand says the double-cup habit was started in New England and is most common there. But by Dec. 1, all the region�s stores will swap foam cups for paper ones that the company says are more environmentally friendly.

New ads tell customers that the �double cup is breaking up� because the chain�s relationship with foam isn�t sustainable. Cold drinks are being marketed as �iced, delicious and single.�

The company says its foam cups will be eliminated worldwide next year.

(AP)