Well I do have some lifestraws on hand not only in the house but in my bugout bag which I would use first. But I really though about it as a way to filter the water that I have stored in drums or going for a long shot here and possibly maybe connecting them to a rain catchment system. If you had screens in place to filter out the bigger stuff ( I have gutter guards on mine) but as a secondary filter before it fills into the drum that it might just work and store filtered water in the drum as opposed to pure rain water with possible settiment at the bottom. Anyone think this is a good idea or am I just shooting blanks here haha..