If you are bringing in the Mac get a flask. I realize the entire concept here is "light weight" - but you are already breaking the rules by bringing a no value add item to begin with. Might as well go all out.

At the very least go buy a pint of Jack, Drink it, wash the bottle in the dish washer and fill with the good stuff.
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should be smails not sails but the m key on the keyboard sucks