Wikipedia
Sheridan's is a liqueur first introduced in 1994. It is produced in Dublin by Thomas Sheridan & Sons.
The idea was originally conceived in the 1980s by Pat Rigby (director of Research and Development for Bailey), to add another product to the single branded company. Production started in 1989 and the new facilities were built for the production at the cost of 2 million . The company was not able to find an Irish company who could make the glass bottles, so the original bottles were made in Italy. Currently, bottles are made in France and England.
It is uniquely bottled, consisting of two separate sections, separated by glass, but fused together. One section is filled with a black liqueur, consisting of coffee and whiskey flavors, while the other is filled with a white liqueur of milk white chocolate.
When pouring into a lowball glass, the white liqueur should be gently floated on top of the black liqueur.
, Sheridan's is not available in the United States, though it can be purchased on cruise ships in the duty-free shops. It is also available at several duty-free shops along the Canada–United States border.