Liqueurs are sold in liquor stores, along with the gin and vodka.
mudslide
You can purchase Hypnotiq liqueur almost anywhere else you purchase alcoholic beverages. The drink was created in New York by a college drop out Raphael Yokoby in 2001. While the drink originated in New York, it is produced in France. The liqueur consists of fruit juices, cognac, and vodka. It is 17% alcohol and 34 proof.
Cocoa,sugar,cream<half and half>
Banshee
Baileys Ice Cream is an Irish alcohol whiskey and cream based liqueur drink, made by Gilbeys of Ireland. The trademark Baileys is currently owned by Diageo.
A White Russian cocktail consists of coffee liqueur (in which case is Kahlua), vodka, and cream. Anything that has cream will spoil very quickly.
Godiva chocolate liquor has a long shelf life if it is unopened and stored in a cool place. As long as the liquor does not develop a funny smell it is fine to drink.
It usually is
Advocaat
Banshee, or sometimes called a White Monkey. Some variations (of this same drink) also add creme de almond.
A very popular drink made with liqueur (there are many of them) is the Brandy Alexander, which uses Creme de Menthe. The Alexander is a good "dessert" drink - it should never be drunk beforea meal.
Usually in small amount from liqueur glasses.