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"Real science opens windows for us to look through. We're right at the footsteps of the most interesting scientists around."
- Larry Niven

Zero-G Ashtray  
  An ashtray designed for use on a space station.  

He saw what a weight-free ashtray necessarily should be: a long tube with a bell-shaped receptacle on its end. A slight suction in the tube, and ashes knocked into the bell were swept away, out of sight and mind.
From Waldo, by Robert Heinlein.
Published by Astounding Science Fiction in 1942
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