This video shows a tip on how to boil water on a leaf in the wilderness. If you are stuck out in the wilderness and you don't have a plastic bottle for water you can use a leaf to boil water for drinking. Build a fire first. Then find a large enough leaf you can hold it over the fire without burning your hands. Fill the leaf with water and hold it over the fire. Only let the flames lick up against the leaf so it won't burn. The edges will curl up closed but the water will boil in about ninety seconds. Then you will have drinking water.