COLOR CHARGED

Take a clean colored glass bottle or wrap a colored cellophane on a transparent bottle.

Keep the bottle in sunlight.

Fill three quarters of the bottle with water.

Put a cork to stop dust from getting in. Clean the bottle at least once in a day.

Don't let the cellophane fade.

Water takes six to eight hours to get charged. For emergency, you can charge water for about two hours, but only in the morning sun.