Vacuum tray

A vacuum tray was a type of ashtray with a receptacle above and a small, mechanical impeller below. The spinning impeller would create a small vacuum, drawing the residual smoke into the tray and through a filtration system, thus providing a less irritating environment.
==Appearances==
*Lando Calrissian and the Mindharp of Sharu 
Category:Household appliances
Category:Society and culture