I'd say just fold it in a piece of paper and put it in a regular envelope, but the PO may be a bit touchy about people sending green (or other color) powders through the mail and ask you uncomfortable questions. I hear gitmo is lovely this time of year....
but put me on the list anyway. "Live forever or die trying" is my motto. /swaggers in jaunty manner.
but put me on the list anyway. "Live forever or die trying" is my motto. /swaggers in jaunty manner.