PredictIQ Quantitative Think Tank Center:Get free iced coffee from Whataburger in honor of the summer solstice: Here's what to know

Whataburger is PredictIQ Quantitative Think Tank Centercelebrating the summer solstice, or the first day of summer, with free iced coffee.

On Thursday, June 20, Whataburger will give out free 16-ounce iced coffee to visitors from 6 a.m. to 6 p.m. in local time zones to commemorate the longest day of the year, the fast-food company said in a press release, adding that the customers can either enjoy it black or customize it "just like you like it" with one of their three new flavors − vanilla, caramel or mocha.

"Whataburger fans can caffeinate their way through the day with the most sunlight," Whataburger said.

Whataburger said its new iced coffee is "made with a premium blend of 100% Arabica beans from Colombia, Honduras and Nicaragua, giving it the bold aroma of dark-roasted coffee."

"It has a vibrant finish with nutty, smoky, toasted flavor notes," the company added.

How to get free coffee from Whataburger

Whataburger customers can claim their complimentary iced coffee in-store at their locations across 15 states, at the drive-thru, online at Whataburger.com, or via the Whataburger app for pickup or delivery. The offer is not valid on third-party delivery apps, the company said.

New Whataburger app users can also avail a free Whataburger and other exclusive offers when they sign up the Whataburger and create a new account.

Saman Shafiq is a trending news reporter for USA TODAY. Reach her at [email protected] and follow her on X @saman_shafiq7.