Sonic's Berries and Cream is a limited-time beverage that features a blend of blackberry and raspberry syrups mixed into Sprite lemon-lime soda and layered with strawberries and sweet cream (because dirty drinks [sodas splashed with cream and/or syrups] are trending).
It's available in sizes ranging from Mini to RT 44. Prices vary by location, but a Mini costs $3.49 at my local Sonic in Los Angeles while an RT 44 is $5.19.
Photo via Sonic.