This article is from the Star Trek Tech FAQ, by Joshua Bell inexorabletash@hotmail.com with numerous contributions by others.
The empty glasses, plates, etc, are put back in the replicator
terminal ("Timescape" [TNG]), and returned as raw materials to the
bulk matter store. It would make sense if they were only disassembled
on the molecular level, as the energy needed to reform new glasses
would be much lower than if they were broken down to the atomic level
or quantum level.
 
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