I didn’t so much want to drink this Thai bottled tea as put it in a sunny spot on my desk and watch it all day, like a lava lamp.
The little black things are basil seeds, which acquire a gelatinous coating when they get wet. They don’t make the drink taste as basil-y as you might think; mostly it has a mild, sweet lemon flavor.
Kopi Susu 2 
My mom used to tell me to drink “selasih” (basil seed) when I had sore throat as it was believed to give a soothing effect. I like them in “es campur” mixture too.
Looks like frogs eggs to me!Tom
I prefer to drink mineral water dude.