It's a type of um, brewed tea that's with ice, and sugar depending on your taste. The one I got is just regular milk-tea flavor, and it's half-sweet, which means it's not as sweet as this.

[ he points to the slushie. ]

--Oh and it's got tapioca at the bottom. Bubbles that the big straw picks up.
It's delicious.

[ its a trap ]