I'm thinking of sneaking food in the theatre by hiding it in my purse.
Why do you want to sneak food into the theater?
I'm hungry! I'm gonna smuggle food in my purse
It's okay to bring food in to the theater if it's not against the rules. Food at a movie theater can be really expensive.
The theatre probably has popcorn. I'm gonna smuggle it in my purse.
That sounds fine if you aren't breaking the rules.