Summer's not over yet. 

Just last month, 7-Eleven gave out free Slurpees in honor of July 11 (also written as...7/11). Now, the convenience store chain is back with another Slurpee promo—and this one's a week-long affair.

From Monday, August 13 through Sunday, August 19, 7-Eleven is offering a two-for-one deal on its signature slushy drinks. Meaning, if you buy any size or flavor Slurpee at participating stores, you get another one free of charge. If you have the 7-Eleven app (which you can download here), both purchased and free Slurpees count towards the store's 7Rewards “Buy Six, Get the Seventh Free” drink offer (plan this right and you can get seven Slurpees for the price of three).

This week of freebies seems like a good excuse to grab a friend for an impromptu 7-Eleven run. Or an opportunity to hone your flavor-mixing technique. It's also the perfect time to try the store's limited edition Cap'n Crunch Slurpee—an aqua, berry-flavored frozen treat that you can order with an "on the go pouch" of Crunch Berries to sprinkle on top. Buy one for breakfast and if anyone asks, tell them it's cool, don't worry about it, it's technically cereal.

If you're feeling ambitious, you could try to track down the elusive Jarritos Mandarin Slurpee, made in collaboration with the super-popular Mexican soft drink brand, and claim it as your free drink. It's currently available in California, Florida, Texas, Colorado, Washington D.C., Arizona, and Las Vegas.

Want your frozen treat to do the most? Right now, 7-Eleven is selling reusable straws outfitted with fake tongues. May we suggest pairing the aforementioned Cap'n Crunch Slurpee with the purple tongue to continue the berry theme? Or, if matching looks are more your style, sip your Wild Cherry Slurpee with the red tongue straw, while wearing red sunglasses and cherry-print anything.