Sonic is your one-stop shop for personalized soft drinks. But have you tried this popular secret menu item? Here's how to order Mermaid Water at Sonic.

Starbucks has co-opted fan-made drinks before. The “Medicine Ball” (now Honey Citrus Mint Tea) started as a secret menu hack before landing on the official menu. And even then, some customers still call it by its original name — much to the baristas’ annoyance.

Starbucks' Secret Menu is now official on the company's app for easy ordering and customization. The launch was made official on July 14.