Como dizer "Pote de conservante" em inglês

Today, I meet some friends in a pub in the city center.

One friend of mine tried to explain something, that, when his mother eat every cucumber in the bowl of cucumber, she recycle the “bowl” and put another thing, for example: some seasoning.

But, he tried to find some word that could fix in this sentence, but, even though, he couldn’t.

However, how could I say in English, “pote” ou “pote de conservante”.

Thanks a million guys.

(I’m trying to write in English, so, excuse for my wrong sentences, and, if you can correct me as well, It would be nice)