I know filtering is faster than chemical tablets and even boiling (taking into account cooling after the fact), but it also takes work. The last thing I want to do when taking a “break” on the trail is do more work. When it was my turn to pump I found that you couldn’t pump too quickly or the pump would slip and add to that the number of people who wanted water and your 15 minute break turns into 45 minutes! That was 10 years ago and now the options are pretty good and getting faster. There are even super compact filter units that will do a liter a minute. I still prefer the Sawyer 7/6/B water filter and here’s why.