A Fremen device used to reclaim water from the bodies of the dead, known also as the Huanui. Under Fremen custom, a body's water belonged to the tribe, and the deathstill extracted every drop of moisture from the remains. The recovered water was measured with precision using water rings, which served as both currency and social markers. The deathstill embodied the Fremen belief that while the flesh of a person was their own, their water belonged to the community.