Quote from: sourman on August 05, 2012, 03:17 pmQuoteI'm a bit leery of using metallic mylar, not for any evidence based reason, I just wonder if it would become a red flag on an x-ray (not for any good reason, but because some idiots think xrays can't see through alum foil (that could be true of radio waves though if you were building a Faraday cage)).Mylar is sometimes used to contain samples in X-ray experiments, so it won't block them. Not sure if it will show up differently on actual package scanners that use X-rays. I guess you could always use resealed potato chip bags or something with a custom label related to food.Yeah, but who posts potato chips through the mail from America or Europe to intentional destinations like Australia? Probably less people than those sending drugs! (when you look at all the RC seiziures Customs makes for example).Tell me more about these bear bag/container things. That's an interesting idea! Do you have any intel on the composition? Most bear proof stuff I'm seeing is not about preventing bears knowing food exists, but preventing them getting at it (cruelty to animals!).