With your own solar still you'll never run out of fresh water. A still of this size can distill 1/2 gallon to a full gallon of water every day.
The video at the bottom of this page has the full detailed plans for this DIY Solar Still. Below you'll find an overiew of the steps involved and the materials needed.
Step 1: Find a decent sized piece of glass to use. Try looking at the discount section of your local hardware store.
Step 2: Build a frame out of 1x4's and at a slight angle to be sure it picks up an adequate amount of sunlight.
Step 3: Insert a piece of exterior grade plywood in the recessed cut of the frame and use wood glue to fasten it.
Step 4: Run a bead of waterproof wood glue in all of the seams of the frame.
Step 5: Notch out the frame on each side for the water collection tube.
Step 6: Prime the entire frame with an exterior primer in case there's a leak in the black plastic. Cut a notch in the water collection tube for the glass to fit into.
Step 7: Spread black silicone caulk all over the inside of the basin.
Step 8: Install the water droplet catch tube.
Step 9: Install the fill tube.
Step 10: Fill the water basin by inserting a funnel into the fill tube.
Watch the video below for a full detailed explanation of this project...