If you make a survival solar still from plastic sheeting, rocks, and a few empty containers, your total cost might be around $5.00 (for the plastic, if you have to buy it). But there are a few different kinds of pre-made solar stills that you can buy, none so cheap. These might come in handy on a boat, but since they’re not very light, they’re not practical for a seaside backpacking adventure. This one, the Aquamate Solar Still, weighs 38 ounces and costs $238.00 on Amazon.com.
But, still…it’s a still, and it can generate up to 2 liters of fresh water a day from a seawater source.
If you’re inclined to try out the make-your-own variety, read my article on the About.com Survival Skills website for materials and construction steps.
Photo © Aquamate.