I bought 4 quarts of Bourbon in plastic containers, after a little padding, I placed a piece of cardboard over that, then lot's of packing peanuts. A box of Montecristos and few fivers of Gurkhas and AF's, a card then lots of peanuts again.
So I figured if any one was going through it they would stop at the cardboard figuring that was the bottom. It worked!
EMS