I dont know if this is the point of the ad, but the Guinness cup remind me of female legs walking. If so, it is totally the idea of sex appeal behind this ad. The lighting is awesome and it works well.
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.