This design is really creative in using utensils to outline the cola bottle, creating what Gestalt calls the closure effect. The use of the classic red and partial outline of the bottle suggests or implies that the beverage is Coca-Cola. With this piece, the fork and knife are the elements that shape the bottle. Most of the time our brains often ignore contradictory information and fill in the gaps. Viewers see the beverage because our brains fill in the missing gaps in order to create a meaningful image.
Again to reiterate, the use of utensils implies that you’ll want to be consuming a refreshing drink with your daily meals, and advertisers for Coca-Cola want to make sure that their cola will be the satisfaction their customers are looking for. Making our brains work to fill in the gaps is a great marketing tool.