Philly Burbs says 7-Eleven is celebrating National Slurpee Day, aka 7-11 Day, today by giving away free small Slurpees at participating stores. A Philadelphia man, named Matthew Cooper, plans to run to every 7-Eleven in the city today for a free Slurpee. He is taking donations for a local non-profit that changes students' lives through mentorship .Matthew hopes to raise $2,000. Google says there are 55 7-Eleven locations in the Philadelphia area