You are totally incorrect in your assertions there Norfolk I'm afraid and you have completely missed the point of using MBBs. The purpose of using MBBs is to avoid MVTR (moisture vapor transmission rate) through the packaging, normal food saver PE plastic is vapor permeable in 15 minutes and therefore detectable by sniffer dogs. Mylar and MBB have much lower MVTR and thus drastically reduce if not eliminate the chances of canine detection. Sorry for the flame but not may vendors on SR are shipping their drugs in car pistons, most come in normal business envelopes and given the volume of these coming through customs they are normally only singled out for inspection when a dog reacts to them. Hope that helps clarify things.