Gender of product names
If a new product name is coined, how is the gender of the noun determined in German?
Car brands are almost always masculine (der Mercedes, der Ferrari, der Peugeot), whereas motorcycle brands are feminine (die Harley Davidson, die Ducati). Thus, if somebody says "der BMW", it is a car, if he says "die BMW, it is a motorcycle.
It is "der Big Mac" and "der Whopper", probably because it is "der Hamburger", but "die Coca-Cola", "die Sprite", "die Sinalco".
People disagree (quite emotionally) about whether it is "die Nutella" or "das Nutella".