>>1734347Edibles on railroads I've never seen. I know that they are used in food production--a rice mill usually has a few cars (cars in the rail sense, not autos) parked on its spur, the ice cream plant uses sugar, and the Anheuser-Busch plant uses grain imported, but these are all covered and not marked. Only once do I remember a clearly-marked vegetable oil car (and it was brand new too). It marked a clear differentiation from the stouter and rustier car carrying molten sulfur.
One type of rare car that I'd seen the 2000s was a sort of hybrid car, looking like a gondola car on the lower half but a tank car on the top. I still don't know what it's called.