Here you go...
*LINK*....scroll down about 3/4's down and look for "Bloxogen". That's the stuff I was talking about. Also, check out the brewing and wine making sites. They sell stuff to keep opened wine and beer fizzy and fresh for weeks and I believe it is just argon as well. They stuff they use does the same thing, blankets the liquid with a heavier gas and pushes out the ambient air.