Soap Dishes for Cella?

Hey Guys,

I wanted to get some information as to what you guys keep your soaps in? I want to buy a chunk of the 1KG brick of Cella and don't know what I should keep it in. Would some kind of tupperware bowl work or would it be OK in a ceramic dish?

I normally keep my soaps in tupperware, but my understanding is that Cella doesn't have any preservatives so I want to make sure I treat it right.

Thanks!