CHICAGO -- Here we go again....
First, there was the unicorn frappuccino. Then, there was a dragon frappucino.
Now, you have a mermaid frappuccino.
This one's got vanilla bean base, frozen blueberries, and green coconut sauce swirled in a cup.
The most important thing according to fans is that it looks great on social media. It's a secret menu item, so hardly any details are available online.