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What Are Dirty Sodas, and Why Is Everyone Drinking Them? | Eater

"An Utah-based chain that expanded to its 50th U.S. outpost in 2023 and helped carry the regional creation into the national spotlight via social media; Gen Z musician Olivia Rodrigo posted a photo with a cup from a Utah chain in December 2021, helping the drink trend on TikTok in early 2022 (April 2022 saw more than 700,000 mentions of #dirtysoda, and creators continued sharing recipes into 2025). “Dirty sodas have become more than a novel beverage; they have enmeshed themselves into the culture of Utah,” Michelle Leung wrote for Vice in 2016. The formula commonly associated with the chain is simple: a Diet Coke poured over ice, then spiked with a shot of coconut syrup, lime juice, and half-and-half; some shops use coconut-flavored coffee creamer instead of the syrup. The chain is part of a wave of brands expanding nationwide and is tied to the trend’s popularity among Utahns who abstain from alcohol and coffee." - Amy McCarthy