Drink I saw in class on campus?

Saw this drink in class on campus and wanted to know what it could be? There is a Starbucks and Taco Bell on campus but I’ve never seen this kind of Starbucks drink before and it looks like Baja blast but it looks too muddy unlike Baja blast which you can still see through. So I’m assuming this is a Starbucks drink but I’m not sure what would make a green chemically looking drink at Starbucks.