This is a great minimalist waterfilter to keep in your survivalgear. It is lightweight and fairly inexpensive, so it makes a great addition to your pack. This is not they type of filter that you would rely onforcamping or hiking, but in an emergency it could save your life. You can live for about three days without water, so a simple filter like theAquamira Frontier could allow you to drink from a stream or river, keeping you alive.