SONIC launches the Blackout Slush Float nationwide on March 25th, coinciding with the April 8th North American Total Solar Eclipse. Guests get free eclipse viewing glasses with every purchase of the Blackout Slush Float, while supplies last. The treat features an all-black slush with soft serve and galaxy sprinkles. Former NASA astronaut Terry Virts shares eclipse-viewing tips. Available until May 5th, SONIC donates a portion of sales to public education through SONIC Limeades for Learning. $1.99 Crispy Tender Wraps are also available until May 5th.
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