Yep "The proper stuff" is allways in either smallish jars or smallish tins. That stuff is possibly American style mustard known either as "Frenches" or "Grey Poupon".
Or as a very extreme guess, it could also be a container of waxy, melted, plastic cheesey substance.
Or as a very extreme guess, it could also be a container of waxy, melted, plastic cheesey substance.
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