Duck Donuts offers free iced coffee on June 21

KNOXVILLE, Tenn. (WVLT) -- Duck Donuts announced their plans to kick off the start of summer by offering customers a free regular-sized iced coffee on Wednesday, June 21.

People will be able to choose between Southern Pecan flavor or the Light House Blend.

A representative with the company said no purchase is necessary, but customers must present a printed or mobile coupon to be able to score the deal. The coupons are available at or on the company's Facebook page.

“The summer solstice is the longest day of the year and Duck Donuts is excited to help its customers stay energized throughout the day with a free, 16-ounce iced coffee,” Russ DiGilio, founder and owner of Duck Donuts Franchising Company LLC said.