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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...

Step 2:

2) Using your knife, scissors, or anything sharp, make a small hole in the center of the cap.  Make sure the cap is on tight!
In my case i used a small screwdriver and easily made a nice hole in the center.
A knife or scissors work just as well.

Step 3:

3) Now stick your coffee filter (or cotton balls or fabric) through the hole and down by the cap.  You may have to cut the size of the coffee filter down to make it fit in the bottle.  I had to use a pen to push the coffee filter down to the bottom. 

Step 4:

4) Now get your sand or crushed charcoal and fill up the bottle about 2 inches. 

Step 5:

5) Next, add your gravel into the bottle. Around 2 inches of gravel should be enough.

Step 6:

6) Finally add your larger gravel or small rocks into the bottle.  Again, 1-2 inches is enough. 
Your water filter is now complete!  Just put the filter over your cup for filtered water. 
With the other cup, pour the dirty/muddy water into the filter.

Step 7:

Watch your dirty water come out filtered!  
Boil the filtered water to completely rid of all bacteria and such!
Enjoy!
<p>I got good Ideas to but can you make one with a switch to turn it on and off. Also 4 feet long..</p>
Why did u put the things in that order
wow that is cool
<p>this is so awesome</p>
<p>not as awesome as my head</p>
<p>well done!</p>
<p>thank you so much, this means the world to me!!! love you more than life itself....</p>
<p>thanks a ton! wanna get married?</p>
<p>thank you so much that means a lot</p>
<p>this has changed my life entirely. I am now a carnivore. i love you, Pinocchio. i'm marrying Pinocchio. Here's a picture</p>
<p>Pretty nice, I've made these types of filters a few times, but decided to opt for a more<br> <br><a href="http://www.readytribe.com/lifestraw-review/" rel="nofollow">professional option</a> for my future use. </p>
<p>How long does it take for the water to go through the filter to the bottom?</p>
<p>lol</p>
<p>DANG! I need instructions to make one that does not use gravel or rocks.</p>
<strong><em>hi</em></strong>
<p>If you really concern about water filter. You should see these <a href="http://purewaterfiltersystem.com" rel="nofollow">reverse osmosis system reviews</a> articles.</p>
<p>Looks more funny than useful</p>
<p>Thank you for this wonderful idea. now i have something to do for my I.P (investigatory project) coz i've been running out of ideas lately HEHEHE !!!!!</p>
<p>Thank you for this wonderful idea. now i have something to do for my I.P (investigatory project) coz i've been running out of ideas lately HEHEHE !!!!!</p>
<p>Thank you for this wonderful idea. now i have something to do for my I.P (investigatory project) coz i've been running out of ideas lately HEHEHE !!!!!</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>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.
Congratulations on posting your first Instructable - have you seen <a href="https://www.instructables.com/id/Rewards-for-New-Authors/" rel="nofollow">the rewards you can get as a new author</a>?
<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.

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