How to use blood purifiers in Dune: Awakening

Scavenging and exploring in the scorching sun of Arrakis is thirsty work, which is awkward as, y'know, it's a desert with little in the way of hydration. To get around this problem in Dune: Awakening, you can use blood purifiers to turn your enemies' blood into drinkable water. Is it disgusting? Completely. But it's also necessary to survive.

Despite researching, crafting, and using a blood purifier actually being a main objective early on, you're given little in the way of a tutorial for actually using it.