During World War II, the American Hershey's company received a joint request by the American, British and German Armed Forces to develop a heat resistant chocolate for soldier's rations. The German chocolate industry was occupied producing their own standard products for soldiers in the Eastern front. Hershey's came up with the Tropical Chocolate. It's strong, hard and doesn't melt even in hot climates. The first versions were bulky, tasted only barely like chocolate and upset the stomach. Still, they were calorie-heavy and a sweet treat. Hershey's Tropical Chocolate would serve as a standard issued ration dessert for Allied soldiers. These WW2 chocolate bars are characterised by their large size and red print. The ridiculous amounts produced, several billions, ended up flooding Oceanyka's markets when hostilities ceased. By 1957 three important changes were made to the formula; its taste was significantly improved, the portion was reduced (but rations now included two of them) and the package received a blue print. These later Hershey's Tropical Chocolate bars are more expensive, but taste better and are easier on the stomach. The first model is still in limited production in Oceanyka, which coupled with all that WW2 surplus makes it significantly cheaper than the newer blue print.