Solar Water Purifier

About: I like making simple little things that are fun to use I'm not one of those people making huge things so don't be intimidated thinking that I have huge instructables! Though I was thinking about that flamin...
  1. Milk Jug
  2. Scissors
  3. Tape/Glue (optional)
  4. Plastic Wrap
  5. Cup or other small container
  6. Salt water (for testing)
  7. Knife*

* I used a pocket knife

This water purifier works by having salt water inside evaporating from inside then sliding down the side and out the hole without all the salt making it perfectly clean good to drink water.

Step 1: Preparing the Milk Jug

First make sure you wash out the milk jug with hot water.

Step 2: Making Water Slot

Cut a square out of the side of the milk jug, then cut down deeper on the left and right hand sides and bend it inward.

Step 3: Cutting the Cap

Cut a large round hole in the top of the cap.

Step 4: Plastic Wrap

Cut a small square of plastic wrap and put it over the hole in the cap. (it doesn't have to be taped/glued because when you pull it tight it doesn't fall off but taping or gluing it is a good idea)

Step 5: Putting It All Together

Screw the cap on to the bottle and you're done!! If you want to test it put some water with salt in it that you've tasted and made sure tastes like salt water. Then put your cup or container next to the hole in the side of the jug and put it in the sun! : )



    • Organization Contest

      Organization Contest
    • Warm and Fuzzy Contest

      Warm and Fuzzy Contest
    • Remix Contest

      Remix Contest

    5 Discussions


    1 year ago

    Hi. I don't quite understand the concept behind it. The water will evaporate then condense on the side wall and drop back onto the container except a very small amount which may drop onto the catchment slot on the side. Even then that amount will run down the outside of the container. I also don't understand the cap modification. I an interested in the underlying concept but I feel I am missing something. Please explain how it works in more detail. Thanks.


    1 year ago

    What is the reason for altering the cap?


    1 year ago

    What does it does it operate?

    Too much missing information...rewrite - re post.

    2 replies