Well excuse me for thinking you were posting on topic.
I could be wrong, but I wouldn't think any restaurant of any kind, would allow any outside drink container, even an empty one (except of spit), even at the most red-neck of red-neck hillbilly regions.
EDIT: Oh you said they can do that, like you know for a fact they can... well regional differences I guess. You sure as fuck can't do that anywhere in this state.