I really like how the Surfrider Foundation have represented the effects of plastics in the ocean. Showing the plastic in sushi which is sea food to represent the ocean I think is a clever and very creative way to grab people's attention.
I like how they used the tip of the pencil to recreate the shape of a mountain. This provides a new perspective. Using the pencil to recreate a scene that relates to the Swiss brand (i. the Swiss Alps).
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.