Cadbury chocolate is seen in this picture illustration taken July 18, 2017.

M & M chocolates are pictured for sale on a store shelf in the Manhattan borough of New York City, New York, U.S. July 19, 2017.

Giant Hershey's Kiss chocolates are seen on display in a shop in New York City, U.S., July 20, 2017.

Cocoa pods are seen in a cocoa farm in Anyama, Ivory Coast July 21, 2017.

White chocolate is poured on chocolate filled candies in La Giralda chocolate factory in Mexico City, Mexico, July 21, 2017.

Chocolates are offered at the factory shop of Swiss chocolate manufacturer Aeschbach Chocolatier AG in Root-Luzern, Switzerland July 21, 2017.

A dried cocoa pod and roasted beans are pictured at a workshop of Belgian chocolate maker Neuhaus inside the Galeries Royales Saint-Hubert in central Brussels, Belgium, July 17, 2017.

A worker prepares hand-made chocolates at the Nahua Chocolate Factory in San Jose, Costa Rica July 19,2017.

A bakery worker prepares hand-made chocolate at Big Bang Candy Lab shop in Sao Paulo, Brazil July 20, 2017.

Handmade chocolates are seen at a Patchi factory in Siblin village, south of Beirut, Lebanon July 21, 2017.

A woman reacts as a beauty therapist applies a face mask made out of chocolate at a natural health and beauty clinic in Ciudad Juarez, Mexico July 21, 2017.

A Mars chocolate bar is seen in this picture illustration taken July 18, 2017.

An ice cream vendor fills a cone with chocolate ice cream in Peshawar, Pakistan July 19, 2017.

Chocolate bars of Swiss chocolate maker Lindt are pictured at a store in Paris, France, July 20, 2017.

A cup of chocolate is seen at the Chocolat bar in Madrid, Spain, July 21, 2017.

Chocolate filled candies are pictured in La Giralda chocolate shop in Mexico City, Mexico, July 21, 2017.

After Eight chocolates are seen on display in a supermarket in Islamabad, Pakistan July 18, 2017.

A detail of an advertising poster for Chocolat Delespaul-Havez (1900) is pictured at the Planet Museum of Chocolate (Planete Musee du Chocolat) in Biarritz, Southwestern France, July 19, 2017.

Cocoa beans and chocolate bars are displayed at 'Minimal - Bean to Bar Chocolate-' shop in Tokyo, Japan July 20, 2017. The bean-to-bar chocolate manufacturer oversees the chocolate production from sourcing the cacao beans to making the chocolate bars in the shop.

A farmer holds an opened cocoa pod at his farm in Anyama, Ivory Coast July 21, 2017.

Kirschstaengel cherry liquor stalks on a conveyor are covered with chocolate during production at the factory of Swiss chocolate manufacturer Aeschbach Chocolatier AG in Root-Luzern, Switzerland July 21, 2017.

A man spreads cocoa seeds to dry them off at La Calera farm in Granada, Nicaragua July 21, 2016.

A Kit Kat chocolate bar is seen in this illustration photo taken July 20, 2017.

Image used for illustrative purpose. Organic chocolate is seen at Marana chocolate factory in Lima, Peru, July 19, 2017.

Workers mould chocolates at "La muchacha de los chocolates" handicraft factory in Montevideo, Uruguay, July 21, 2017.

Hand-made chocolates are displayed at the Puyricard chocolate factory in Puyricard, France, July 18, 2017.

Original Salzburger Mozartkugel pralines are seen during production in the 'Fuerst' confectionery in Salzburg, Austria July 19, 2017.

A chocolate model of the Eiffel Tower is displayed at the Swiss chocolate maker Lindt store in Paris, France, July 20, 2017.

Handmade chocolates are seen at a Patchi factory in Siblin village, south of Beirut, Lebanon July 21, 2017.

Chocolate filled candies are pictured in La Giralda chocolate factory in Mexico City, Mexico, July 21, 2017.