Back in the good old days of army surplus-stop that charging woodchuck at 3000 yards with your swedish 37mm anti-tank rifle, barrels of enfield bayaonets at $1 apiece, $20 mausers in cosmoline- there were desalination tablets-about the size of a hotel bar of soap- that disintegrated into a batch of sludge at the bottom of the waterbag; usually found with packets of yellow dye/shark repellant and mae west life preservers....*sigh*...so many missed opportunities.