Here is 2 small ideas
If you want to collect some good water to drink in the plain land in rainy season, just carry piece of thin cotton cloth measuring 2 meters. While it rains tie the cloth to 4 posts made of wooden poles; now place a small stone in the centre of the cloth piece.your rain water harvesting device is ready.
If you want cold water, carry a pot shaped vessel with small mouth.fill it with water, place a thin piece of cloth over the mouth and tie tightly with a lace. Now rotate that upside down suddenly, hang it in the shadow of a tree.wait for half an hour, your cold water is ready.try it, looks funny but it work.
If you want to collect some good water to drink in the plain land in rainy season, just carry piece of thin cotton cloth measuring 2 meters. While it rains tie the cloth to 4 posts made of wooden poles; now place a small stone in the centre of the cloth piece.your rain water harvesting device is ready.
If you want cold water, carry a pot shaped vessel with small mouth.fill it with water, place a thin piece of cloth over the mouth and tie tightly with a lace. Now rotate that upside down suddenly, hang it in the shadow of a tree.wait for half an hour, your cold water is ready.try it, looks funny but it work.