FILE- This Jan. 22, 2018 file photo shows the Dunkin' Donuts logo on a shop in Mount Lebanon, Pa. 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. (AP Photo/Gene J. Puskar, File)
FILE- This Jan. 22, 2018 file photo shows the Dunkin' Donuts logo on a shop in Mount Lebanon, Pa. 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. (AP Photo/Gene J. Puskar, File) Credit: Gene J. Puskar

HARTFORD, Conn. — The next time you get a hot drink at a Dunkin’ in New England, don’t be surprised if the cup is a little different than what you’re used to. The company announced Friday that it will completely phase out its foam cups — to be replaced by double-walled paper cups — by Dec. 1.

The move is part of a larger effort by the company to be more eco-friendly, and it’s also a step toward eliminating the practice of “double cupping” — encasing an iced beverage with a foam cup to provide additional insulation.

“As we look ahead to how our brand can continue to serve both people and the planet responsibly, we wanted to proactively address a big change that’s coming to New England: all foam cups will be phased out by December 1,” said Dunkin’ Chief Operating Officer Scott Murphy.

The goal to go completely foam-free was announced in early 2018, and the company said it expects all stores to reach the milestone sometime in the beginning of 2020. For now, about 70% of locations will transition to paper cups by the beginning of next month.