i decided to make a solar still.
in principle i have always known how to do this but never tried it.
in principle you can use this method to purify or collect water, depending on how you set it up.
you need two containers and a plastic sheet, and a way to fasten the plastic sheet around your container. your inner container should be suspended or propped up about the water level.
if you are collecting rather than purifying, your outer container is a hole you have dug into the ground deep enough so that there is some moisture.
your plastic sheet should sag over your collection container so that condensation from the hole (or from your water that needs purifying) drips down to be collected.
since i usually have no shortage of water, i decided to set myself up with a purifying version, which also saves me the trouble of digging a hole.
well, the rock is just a rock.
but a pretty heart-shaped one.
my collection jar is suspended under the low point with a shoelace.
i set it up and let it run for four days.
i think what i learned is that the surface area of my evaporation needs to be much larger in relation to the collector, and that to make this work your really need warm sunny days.