Starting a fire when you have no matches or lighter is a difficult task. But using the tricks from this video with a water bottle and some paper.Might have to try this one out for myself.  Looks like it might be a bit harder than the video makes it out to be.  I have plenty of water bottles laying around the office.  This is great to know if you get caught out in a survival situation in the East Texas sun.  At least you won't have to eat your food raw.