Hey Don, a friend of mine, a post doctoral student at the Univ. of Alaska, took one of those bubble mailers & used a syringe to fill each bubble with argon gas. He then mailed me an ice cube. It took the Post Office 10 days to deliver it & the ice cube was still half frozen. The bubble mailer didn't leak at all! Ain't modern packing technology wonderful?

Dave Smith in NH
"Live Free or Die"