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"There was a time when one old eccentric guy with a notebook could do something important to science. Now even the resources of a major university are often not enough."
- Jerry Pournelle

Catchpocket  
  A small container in a stillsuit that stored reclaimed water.  

The most important piece of equipment that a Fremen owned on the desert planet Dune was the stillsuit, because it reclaims water from the body.

"...Reclaimed water circulates to catchpockets from which you draw it through this tube in the clip at your neck...
From Dune, by Frank Herbert.
Published by Putnam in 1965
Additional resources -

Here's what it it's like to depend on your stillsuit for water:

"...the ones who carried their pack say there's literjons of water in it. Literjons! And us sipping our catch-pockets the instant they show dewsparkle."

Dune stilltents also reclaimed moisture from the air, and they, too, had catchpockets.

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Additional resources:
  More Ideas and Technology from Dune
  More Ideas and Technology by Frank Herbert
  Tech news articles related to Dune
  Tech news articles related to works by Frank Herbert

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