We go thru a couple gallons a day, how do you wave a steripen in a bucket and get it close enough to all parts of the water to have the correct contact/exposure time to kill ? Possibly in a small container but no so much on a larger scale like gallon bladders and such.
I have a steripen and I've used it once. My wife is a PA and read about them on the CDC website which advises against them and she won't let me use them anymore. We recently bought an MSR Guardian which is the most robust water filter available from what I've seen. it's expensive, but it was a pretty important piece of kit on our last backpacking trip in Big Bend National Park. The only water we found was a disgusting scum filled puddle in a otherwise dry creek bed. If we weren't able to get water from that, it would have meant an eight mile hike out of the mountains and back every day.have you thought about a steripen ? we used them for about 20 days last fall on a pack in hunt . seemed to work , nobody got sick .