There's nothing better than kicking back on a hot summer day with a glass of iced tea in hand. Whether you like your drink sweet or unsweetened, from the store or homemade, take some time Wednesday to celebrate National Iced Tea Day.

Iced tea has been served for centuries, first containing alcohol and being called "punches" in the 1800s, NPR reported. The nonalcoholic iced tea trend started around 1904, when it was popularized at the World's Fair in St. Louis. Over time, due to high prices and scant availability, iced green teas lost their following. By the end of World War II in 1945, iced black tea reigned supreme.

Now, on any day, at least half of the United States drinks tea, according to the Tea Association of the U.S.A. Inc. About 85 percent of all tea Americans drink is iced.

Take today to honor the beverage you're sure to be sipping all summer. You can grab a glass for free or cheap with one of these deals:

Get any size or variety of iced tea for $0.99 through the Dunkin' Donuts mobile app. The offer is good through June 30.

Teavana stores are giving away a free 16-ounce Pineapple Berry Blue iced tea while supplies last. No purchase is required to get the exotic mixture of Pineapple Kona Pop and Blueberry Bliss Roobios.

Some Wendy's locations will give out free 12-ounce Blueberry Pineapple Fruitea Chillers from 11 a.m. to 7 p.m.

Visit Snapple's website at to print a coupon for a free Snapple Tea at Walmart.

La Madeleine County French Cafe locations are offering free traditional and Mango Breeze iced tea if you mention their promotion.

Check out to print a coupon that gets you one free bottle of Inko's white tea at a retailer near you. These include Whole Foods, Wegmans and Rite Aid.

If you're near the Charlotte Douglas International Airport in North Carolina, stop by the main atrium to get a free cup of sweet or unsweet iced tea.