I was looking in out emergency water tank the other day, the council ones, which I refill each year. The lid isn't that tight, and you get bits and pieces falling in. When I find some reasonably priced I'll get a 200L barrel with a screw lid as well.
I have purification tablets and some ability to boil the water with gas, but they'll only last so long. I wondered if a purification system would work.
The LifeStraw Family 2 looks good, but it's $180. v1 is US$60 at Amazon, which isn't bad.
Does anyone know any good cheaper reliable alternatives to the Lifestraw family?