This Water Filter is very easy and quick to make. Most, if not all the materials can be found in or around your house.   A Water Filter can be a necessary survival item if you have no access to clean water.

Materials Needed:

- Water Bottle
- Scissors or Knife
- Coffee Filter, Cotton Balls, or fabric.
- Sand or charcoal
- Gravel
- Large gravel or small rocks
- Cup to hold filtered and non-filtered water.

Step 1:

1) Using your scissors or knife, cut of the very end of the water bottle like so...
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<p>awesome filter&amp; best part easy to make most stuff is expensive to buy because im12 looking for stuff like this</p>
<p>awesome filter&amp; best part easy to make most stuff is expensive to buy because im12 looking for stuff like this</p>
<p>I'm so happy this guy put this on the internet, now for once I wont flunk my classes. I CAN'T BELIEVE I'M ACTUALLY DOING MY HOMEWORK!!!!!!!!!</p>
<p>using this as my science fair project. thank you.</p>
<p>this actually works everytime</p>
<p>i know right</p>
<p>I am gonna make this thing!</p>
<p>I can do this easily</p>
<p>dose it work?????????????????????????</p>
<p>Very cool, I am going to use this in my science fair project :D</p>
<p>cool dude</p>
<p>Isaiah thats what I'm doing for my science project to</p>
<p>this is interesting! i might try it... BTW bioling water doesn't kill all the bacteria.</p>
Neet, though just a warning. This will not remove bacteria (what's actually bad for you) just particles. <br>It's based on a slow sand filter, but it won't work as one.
<p>actually, with a regular supply of moisture, some beneficial bacteria will develop in the sand. to make use of these, there should be about 4-5 times more sand in the bottle in order to slow down the current.</p>
<p>You're talking about a slow sand filter. Something the size of a 55 gallon drum would work. </p>
Read step 7
yes, its just supposed to filter out leaves, sticks, small rocks, etc. so all you have to do is boil it.
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<p>This is what your links produces, Kiteman</p><p>&quot;Sorry, we just can't find that one!&quot;</p>
Try again, it works for me.
<p>We're sorry, the URL is either incorrect or no longer available. <br>Maybe you are looking for one of the following Instructables below.</p>
<p>Ach, now it's working for me either. Sorry, folks.</p>
<p>same message.</p>
<p>Must have just been taken down or only set up to be seen by pro memberships? I'm getting the same message.</p>
<p>i am pro member but still its not visible.<br><br>Error<br>Sorry, we just can't find that one!</p>
Awesome! I've been looking for something like this. One question; is there a limit to how many times this filter can be used before changing the coffee filter, gravel, etc?
After boiling you'll want to pour the water between two clean containers. Boiling takes out the dissolved oxygen. It leaves the water flat tasting. Sloshing it between containers puts oxygen back in.
I really like this idea. I've made something like this out of bamboo, but the plastic bottle is great. You might want to start the first layer with grass, if you don't have cotton or a coffee filter. It will serve the same function. Also, sand helps to trap suspended particles. I would suggest using charcoal also (might need a larger bottle). Charcoal will help remove bacteria, including giardia. Top it all off with some more grass and a few rocks to hold it all down. Love the concept. +1

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