How to make a life saving straw?
It's a survival device that some people carry in their backpack.
I tried to make one using this home made water filter but it's not enough according to the author. I tried to filter some turbid water that used to come from our tap water during rainy seasons and it didn't work.
I have a big packet of charcoal pellets with me now and no use for them. Can someone give an idea how to construct the life straw ? Or what are the other uses for charcoal pellets?