Large Drinks at Sonic are 99 cents All Day September 6th
Get a large drink at Sonic for the promo price of 99 cents all day on Wednesday, September 6th. Tax not included. Add-Ons cost extra. Offer includes Large Soft Drinks, Famous Slushes, Iced Teas and Regular Hot Coffee. Not good in conjunction with any other offer or combo. Offer valid only on September 6, 2017, while supplies last at participating SONIC® Drive-In locations.