SONIC Goes Boldly Sour with the New SONIC Sour Shamrock Slush for St. Patrick’s Day

This eye-catching, limited-time, green apple-flavored treat is available nationwide starting Monday, March 2 Follow the pot of gold to SONIC, where bold, sour flavors meet St. Patrick’s Day celebrations with the newest seasonal sip, the Sour Shamrock Slush. The Sour Shamrock Slush features a tangy green apple slush packed with sour popping candy, topped with a fluffy cloud of whipped ... Read More