In doug's Two Person Primary Survival Kit He says:
"1.2 Qt./ 1.25-liter Wide Mouth Rectangular Loop-top Lexan Nalgene Bottle filled w/ purified water then boiled and sealed*"
How do you seel water in a bottle? Is the bottle valcume packed or is it just tighted?

And how do you spell sealed? Is it sealed or seeled? Thanks