I unload boxes for UPS and its pretty hard to steal something from there...unless youre friends with a truck driver or something there isnt any way to get anything out. What I suggest for sending a cue or something of the sort...put it in its tube, then find a box that can hold the tube. Put lots of packing peanuts in the box, then wrap it tight like you would wear a jimmy hat...dont worry about your customer getting it open, all he has to do is cut the box to all hell and then hell get to the tube. The problem with these tubes and what not is that they roll around on the "extendo" which is the belt that goes into the truck. So to recap, place tube in box, wrap box in tape like never before, and youll be fine. Tubes get lost, or they roll off literally the miles of conveyor belt, boxes have a much harder time of doing this.
Zach
Zach