Pelo que pude entender, basta um recipiente rigido e bem vedado, não precisa ter um "chupador" de ar, mas todos temos um soprador, na forma de compressor de aerografo, daí presisaremos de uma válvula especial, igual a do aerógrafo, que ao passar o ar, chupe o ar do recipiente, Essa válvula é que precisamos saber o nome!
Lembrem que todo mundo tem um aspirador de pó em casa, chupa de um lado e solta do outro!!!!!
Uma bomba de encher pneu invertida , ou, muito mais fácil uma bomba de vácuo manual ( da direita), devem fazer o serviço.
A caixa rígida é que não tive ideia, já tente fazer com caixa tipo tuperware e não deu certo ela engruvinhou toda, aina acho que a cúpula de acrilico de queijeira seja o caminho mais certo, ou tubod de PVC de 5 polegadas
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![](http://www.soilcontrol.com.br/arquivos/soilcontrol/produtos/big/Bomba_SC_201032151111.jpg)