[Parnassus]

As an answer to the original question: As Zhiroc says, there have been times on TV where a red can has been shown and you instantly know its a coke can. This, in itself, can be amusing because we all like to think we're smart enough to catch it. I'd vote for the second option, a green and yellow bag filled with fertilizer, just for the fun of saying, "Hey, I've seen that bag before! I know what it is!"

Of course, this opinion is based on the fact that: