I once attended a party for the local USCG brass, it was thrown by one of the contractors for their new, guaranteed-to-fail aircraft parts database. The contractor boss pulled me aside and told me to watch the facial expressions as the guests sampled the dips and spreads ...he had put Marmite in one fancier serving dishes. Unmarked, no visible jar. It was hilarious.
BTW, the stuff tastes like 90w gear oil.