(WENY) -- A summer staple is returning just in time to fend off the summer's heat wave. 

7-Eleven is celebrating its 96th birthday on Tuesday with its annual "Free Slurpee Day" celebration. The convenience store chain, along with participating Speedway and Stripes stores, is giving everyone a free small Slurpee drink while supplies last.  

To receive the free Slurpee, all customers have to do is show up at a participating location and ask for a free small Slurpee. In addition to all the regular flavors offered, participating stores will also feature a limited-time "Sprite Lymonade Legacy Slurpee" for customers to choose from.  

Tuesday's promotion is the 21st year of 7-Eleven's free Slurpee celebration.