How to Boil water without pots or pans

This video illustrate how to boil water without pots or pans. Here are the following steps:Step 1: You need fire, water and any plastic container with lid.Step 2: Now take water and fill it in the bottle so that there is no air present in the bottle.Step 3: Now put on the fire and put the seal bottle on fire with a distance of around 12 inch.Step 4: Now let the heat warm up the bottle and be careful while handling the bottle.Step 5: After the water has heated up, bubbles will appear in the bottle showing water has boiled .Step 6: Now open the seal carefully.that's it.