Free MiO Energy, Tomorrow at 7-Eleven! This deal was posted on April 22, 2013 at 2:00 pm by Katie Leave a Comment Try MiO Energy tomorrow for FREE at 7-Eleven! Just head to your local 7-Eleven tomorrow, 4/23, and grab a FREE MiO! *While supplies last. Don’t miss out on the latest and greatest freebies! Enjoy! Thanks Swaggrabber!