This is a SeaPack Emergency Desalinator that generates survival drink from salt water using forward osmosis. A perfect addition to a ditch bag or life raft. It will make 1/2 liter in 5hrs, and comes with a waterproof drybag.
It can also be used with muddy or unclean fresh water, and makes a great emergency kit for natural disasters on land.
Price is $35 +shipping. Item is located in Brunswick, Georgia.