That's what I was thinking... it's either a prison or some high level medical research type facility which can't be contaminated w/ ANYTHING from outside.
But, at a prison, don't the guards & officers have access to either the same food the prisoners are getting or their own kitchen?
Regardless, if the place is that secure, there are going to be video cameras all over the place, & you really wouldn't be able to "sneak" & eat something you brought from home anyway.
I wish the OP would come back & provide more clarification!! There ought to be some kind of posting law - you can't just abandon your thread & not update!