Flat rate boxes are your best bet for shipping.
I'm told you can fit 13 beers, a bag of jerky and a smut book in one if you wanted to, but it would have to be sent to a non-fun hater.
CP members came up with a great package for my brother's unit a few years ago...it happend quickly and quietly, but these guys came through. Computer games and stuff were a hit as well. Most have laptops.
Send the stuff to other units....we're taking pretty good care of my brother this time.
"Silence is Golden. Duct Tape is silver"