Make your own simple water filter using natural materials!
Cut the plastic bottle in half. Use the top half as the filter. Turn it upside down like a funnel.
Place cotton or a coffee filter at the neck of the bottle. This stops fine particles.
Crush charcoal into small pieces and add a 2-inch layer. It removes chemicals and odors.
Add a layer of fine sand, followed by coarse sand. Sand helps trap dirt.
Put a layer of gravel or small stones on top. This blocks large debris.
Pour muddy water into the top. Clear water will drip out from the bottom.