From the article:

Riffing on the idea that ‘eating was tending toward breathing’, Harvard professor David Edwards, in conjunction with design studio Le Laboratoire, has created Le Whif, the breathable chocolate. No chewing, no calories, and it comes in mint, rasberry, mango, and plain chocolate flavors. The product may just be a fancy scratch-and-sniff sticker, but it looks so sleek and design-y.