Heinz ketchup poster - in this poster, designer put the stalk of tomato on top of the ketchup bottle to represent tomato. Designer used just two elements(ketchup bottle and tomato top) but now it show new aspect from that. It's simple but smart.
This poster represents an interaction between two systems of color. Each pattern of color possesses its own unity. Overlapping creates an even richer experience of unity and also a sense of depth through the use of transparency or transition.