Sure. Pick a clear, flat spot and lay a tarp or a sheet of plastic. Make a shallow pit, put a bowl in the center, and pour water into the pit. Let the sun do the work. The plastic will collect condensation on its underside; you’ll see droplets form and trickle down into the bowl. If you have a piece of charcoal, place it in a small container that can sit inside the bowl. It’ll help remove some impurities. If you need more purification, boil the water for a few minutes before drinking. That’s it. No gadgets, just simple physics.

Bark’s a decent back‑up, but stick to the three‑layer filter: charcoal, then bark, then sand or fine gravel. Keep each layer tight, seal the edges, and test a drop before you commit. That’s all you need.

Good. Just remember the order of layers is key: charcoal first, then bark, then sand. Test a drop before you rely on it, and keep the filter sealed. That’s the only thing that matters.