Duck Donuts locations nationwide will celebrate the first official day of summer on Wednesday, June 21 by giving away a free regular sized iced coffee.

Customers can get a coupon from and show it to the cashier on a mobile device or print and bring into the store for the free beverage.

The offer is limited to one person and can be used at any Duck Donuts location. There are several locations throughout the eastern half of the United States. The first Duck Donuts opened in Kitty Hawk, North Carolina in 2007.