I purchased a version of the IRP from "SovietArmyStuff" about 3 years ago and the ration shipped in a plain brown box without any Customs forms on it. Just my address, his address, and a bunch of colorful stamps.
No padding inside the box, either, so the contents were slightly mashed. I usually sample any foreign rations I get, but till haven't eaten any of this. Even the crackers look unappetizing.
