It's 7-Eleven Day, which means free Slurpees for all. Here's what you need to know about America's favorite slush

But for 7-Eleven worshippers, 7/11 is a celebration, a gift and the official harbinger of Slurpee Season. Today's the day the convenience store chain offers a free small Slurpee to any customer who walks through its doors, no strings attached. The offer's good ...

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