One of the things that REALLY pisses people like me off, who love the ocean, is the trash in it and on the beach. A few years ago we dodged yet another hurricane, Katrina came through N.O, and we had started doing the Pot and Machete Challenge. Making salt water potable after a disaster got a lot of mulling over. We went to the Keys for a few weeks and I thought what would you do if you were there with nothing. In the FL heat, water is critical. So I beach combed for some material. There's a lot of junk washed up, it sounded achievable, truth is the junk has usually been afloat for awhile and it would be a miracle if drinking and cooking in any container on the beach didn't kill you will chemical toxins. So I went for putting something together with what you MIGHT fine. Plastic tubing. Tin foil. Coke can. ( You need a much larger container than this to stave off dehydration.) A sealed plastic bag or with plastic on top with a catch basin worked surprisingly well. We got enough to quench parched lips for awhile. No where near enough to survive. So the techniques work. Just think 10 as big as you think you need.