Knowing how to start a fire in a survival situation is essential. But what if you find yourself with no implements to start a fire when you need it.
Fire is needed for cooking, warmth, light and protection and is a great morale booster.
Now admittedly, this method might not be the most practical and hopefully is a last resort when normal methods fail but I thought it very interesting nonetheless.
The idea is not as far fetched as it seems as the method uses refraction of water in the bottle as a magnifier of heat.
Still, a good one to keep in the back of
your mind if ever (hopefully not) you find yourself stuck and need to start a fire.
Remember to practice this method.