In an emergency, a potato chip bag and duct tape can be used as a chest seal. I don’t recommend this unless you have advanced EMT training, and I’m not sure which flavor of chips works best.
$10,000 face value in pennies weighs approximately three tons.
I think that entire article is interesting: it goes into more detail than you ever wanted to know about US pennies (and to a lesser extent, Canadian ones), as well as the economics of same. The only issue is that the events the author describes took place between 2008 and 2009, so it is a little dated.
Pennybullion.com is still in business, and will sell you $100 (face value) worth of copper pennies for $169.95 (plus $10.95 shipping and handling). They are not currently purchasing pennies, just in case you were thinking about getting into the copper penny business.
And you can still buy a Ryedale Sorter, but they go for about $500 now instead of $250.