I use two of them for backpacking. The Sawyer (and a number of other) water filters screw onto standard threads, so I can use 1L potable and 1L non-potable when I'm on shorter trips and not using my gravity bag.

The way I'm imagining it:

Hero swoops in, matches velocity, grabs person, immediately starts spinning with them and slowing down, thus converting their downward momentum into centripetal momentum?