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DALLAS (CBSDFW.COM) – Have you noticed what day it is on Monday?

Dallas convenience store chain 7-Eleven celebrates every July 11 with free Slurpee drinks. (Because the date is 7/11. Get it?) Just stop by any participating store between 11:00 a.m. and 7:00 p.m. to grab a free small-sized cup in any available flavor. Flavors may vary from store to store.

And this is actually a milestone year for the Slurpee. The frozen drink is celebrating its 50th birthday. In honor of the occasion this year, 7-Eleven has introduced a special ‘Birthday Cake’ flavor. Monday offers Slurpee fans the perfect opportunity to try it out for free.

But there’s more!

Another deal starts on Tuesday for anyone using the 7-Eleven mobile app. The company is offering “hardcore fans” the chance to get 11 free Slurpee drinks when they purchase seven of them at regular price — for the person who needs 18 frozen drinks to slurp down in the heat of the summer. The offer runs until next Monday.