Water Purification

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Introduction: Water Purification

Imagine your stranded on an island in the middle of the ocean and you need clean drinking water ....

well have i got something for you

actually even if your not stranded on a deserted island you should probably enjoy this.

So just sit back, relax, and let old Goawayndstay teach you the art of water purification!

Step 1: GET a BOWL

1. Scavenge through your cupboards to find a semi large bowl

Step 2: Add Water

1. Add several cups of water to the bowl

Step 3: Add Food Coloring

1. Obtain some food coloring
2. Add it to the water

Step 4: Add the Salt

1. Acquire some salt
2. Add it to the mixture of food coloring and

Step 5: Mugtastic

1. Next you will need a mug or cup smaller than the bowl of your choice
2. Insert the cup into the bowl as shown in the pictures

Step 6: Suranatastic

Then you will need a large sheet of saran wrap

wrap it around the pan *loosely*

Step 7: Rubber Bandtastic

You may want to use a rubber band to hold it on but make sure it slightly sagging in the middle

Step 8: Pennytastic

Now all that you have to do is add some weight to the plastic to keep the inverted cone shape

Step 9: Whats Next ?

Now all thats left is to set it in the sun

and to wait

Step 10: TAA DAA !

The water purification process takes some time depending how much water was used

but it should not take more than a few hours for a big batch


how this works: because it a contained environment (similar to a green house) the water heats up more quickly than normal ....that causes it to evaporate ,but because it has nowhere to go, it just condensates on the bottom of the plastic wrap and follows the natural curve of the saran wrap because of the weight . The water than drips into the cup completely color free and salt-free. This is because salt and food coloring does not evaporate with water.

its really a cool little science experiment with a practical use...as long as you have the materials ! Most of which can be improvised with ease

In the picture below you can see the condensation of the water

To give you an idea .....this all happened within 20 min.


I hope you enjoyed this instructable, I will do my best to answer any questions as well

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    61 Comments

    If I do it at home, does it get rid of the chlorine, fluoride and whatever else they put in tap water? And would this distilled water be ok for making colloidal silver?

    the only problem i find with this is, that if your stranded on an island, where are you going to get saran wrap or rubber bands?the nearest supermarket?

    No problem in mediterranean , nowdays we have emergency depots everywhere. In any island there's plenty of junk . Just give a look in prevalent wind exposed rocks or bays and you'll find bottles , jugs , ropes , goggles ,wood and mostly plastic stuff of any kind , fishing nets, buoys and whatever else (!) floats on sea water.

    you would use a coconut as the bowl and leaves as the wrap or just sit the leaf over it and set the other half of the coconut under the corner of the leaf and the condensation will run into the other half of the coconut

    Great. simple and effective. Not to mention the many possible emergency variations of this nice instructable. I have even seen a an ethilic alcohol last chance distiller very similar to this. Spirit was supposet to drip in a cup from a lap of a plastic shopper folded out of the rim of a bucket containing sometthing reminding fermenting fruit juice . I must say the productt was cristal clear and smelled like some kind of vodka drink. I must tell I gently avoided to taste that unelegant basic liquor also because of its unpredictable methanol toxic content .

    what was the straw this that india used when a usa president ordered something to get rid for the dieases in waterit was straw shaped

    Yes distilling water this way is cool, you dont necessarily need food colouring or salt, in the wild you can distill any source of water, salt, polluted, stagnant etc to extract safe drinking water. Equally you can add vegetation and even urine to your bowl, bucket or pit to increase your yield. I tend to carry a clear plastic poncho in my survival kit (the festival type) to use for shelter, gather rain water and as a solar distill if im in the right climate. You can also wrap a clear bag around a branch or bush ensuring it doesnt make contact to collect dew and moisture at the bottom of the bag. If you are ever unsure about the quality of the water you produce then boil it!

    the only thing is this does not remove all the harmful bacteria from the water... we were trying to build something lke this in school and were wondering about adding infra-red lamps (solar powered) to kill bacteria...

    Does anyone know how to make a condenser that pulls the moisture from air? (To collect water, of course).

    notably in the usa owning materials used in distillation as well as owning a still is illegal. while the chances of the atf or irs going after you for an unlicensed still made of saran for water is pretty slim, it's not necessarily something to advertise. of course, i assume, the above is for educational purposes only for those readers in the land of the free.