DALLAS — 7-Eleven Inc. is offering a free Sour Patch Watermelon-flavored Slurpee drink on July 25, which it has declared Sour Patch Kids Day. The convenience-store retailer is celebrating with a free medium Slurpee drink offer activated with the purchase of any Sour Patch Kids candy or Stride Sour Patch Kids gum and scan of 7-Eleven’s mobile app available at participating stores all day.

After downloading the 7-Eleven app, customers will automatically receive the offer via a coupon in the “Scan & Save” section of the 7-Eleven app.

“I am thrilled to partner with 7-Eleven on Sour Patch Kids Day to bring two fun brands together–Sour Patch Kids and Slurpee–with one great day-long offer. We hope fans will love it and join the fun with the Sour Patch Kids Slurpee Selfie Challenge #SPKSlurpeeSelfie,” said Tim Jones, vice president of convenience at Mondelez International, which makes Sour Patch Kids candy.

To spread the word on social media, the Sour Patch Kids Slurpee Selfie Challenge campaign encourages fans to post selfies of themselves on social media using the hashtag, #SPKSlurpeeSelfie, including Slurpee drinks and Sour Patch Kids candy.

The two treats also make an appearance in Summer Forever, a digital movie musical starring singer/songwriter Megan Nicole.

“Both Slurpee drinks and Sour Patch Kids candy are fun treats, and the new Watermelon Slurpee is already a big hit, both in stores and on social media,” said Laura Gordon, 7-Eleven vice president of marketing and brand innovation. “Sour Patch Kids Day offers another chance after 7-Eleven Day to get a free Slurpee drink this summer. The selfie challenge and Summer Forever digital movie give us an opportunity to spread the summer fun to even more people.”

Deerfield, Ill.-based Mondelez International Inc. is a global snacking company with 2014 revenue of $34 billion. It is a world leader in biscuits, chocolate, gum, candy, coffee and powdered beverages, with billion-dollar brands such as Oreo, LU and Nabisco biscuits; Cadbury, Cadbury Dairy Milk and Milka chocolate; Trident gum; Jacobs coffee and Tang powdered beverages.

In other 7-Eleven news, the retailer has teamed up Redbox to give consumers a free movie with every 32-ounce Big Gulp purchase through August 31.

“Not only is this the first national promotion that we’ve ever run with 7-Eleven, it’s also the biggest promotion in Redbox’s history,” said Mark Horak, president of Redbox.

To get their free movies, consumers need to purchase a 32-ounce Big Gulp drink. A tear-off label with a unique Redbox promo code (while supplies last) will be attached to the side of the cup.

Oakbrook Terrace, Ill.-based Redbox, an Outerwall Inc. brand, offers DVD and game rentals through its network of nearly 35,000 self-service kiosks at grocery, drug and convenience stores and select Walgreens, Walmart and McDonald’s locations.

Based in Dallas, 7-Eleven operates, franchises or licenses nearly 10,500 7-Eleven convenience stores in North America. Globally, there are more than 56,400 7-Eleven c-stores in 16 countries. During 2014, 7-Eleven stores generated total worldwide sales of more than $87.5 billion.