Interesting concept. Frozen fruity alcoholic beverage
that you can buy "to go"
and get while you are in your car.
The "law" used to be that if the straw was unwrapped and shoved into the lid, it was an open container (bad), but if you hadn't yet pierced the little "x" on the lid , you were good to go.
Supposedly now, that is no longer the case. They don't care either way, so you should still be cool.
I'm not sure what the real "law" is now, but since we are led by Napoleanic Code down here, we never really fucking know.