Pocket Coffee is a brand name of the Ferrero company for a chocolate confectionery, sold internationally. Pocket Coffee candies are individually wrapped praline and consist of Italian liquid espresso encased in a shell of dark chocolate. They were marketed for the first time in Italy in 1968. 
They are sold most widely in Italy because of the Ferrero headquarters in Alba, Piedmont; the second most availability is Germany.
For many years, Pocket Coffee was extremely difficult to obtain outside of Europe but, while distribution is still limited, it is now available online and in certain major food markets. Production is limited for sale in the winter months (November to April). It is surprisingly very difficult to find in the United States, even though other Ferrero products (such as Tic Tac and Rocher) are highly available.